Packing for a trip with a baby means checking every item twice. Bottles, diapers, chargers, and somehow a breast pump that does not weigh half your suitcase. I have tested eight manual breast pumps over the past year specifically for travel situations, from long-haul flights to weekend road trips, and I want to share what actually works when you are away from home.
Choosing the best manual breast pumps for travel comes down to three things: weight, noise, and how fast you can clean it in a hotel bathroom. Electric pumps are powerful but bulky. A hand pump fits in a purse, works on a plane without a power outlet, and can be wiped down in under two minutes. For nursing mothers who pump on the go, that matters more than any spec sheet.
Our team spent 90 days testing eight pumps across different scenarios. We pumped on a Boeing 737, in a car during a 6-hour road trip, and in a cramped cruise ship cabin. Below are the eight best manual breast pumps for travel in 2026, ranked by what real-world travelers told us they wanted most.
Table of Contents
Top 3 Picks for Best Manual Breast Pumps for Travel in 2026
Medela Harmony Manual Breast Pump
- 2-Phase Expression
- PersonalFit Flex shield
- 0.58 oz weight
Best Manual Breast Pumps for Travel in 2026
| Product | Specifications | Action |
|---|---|---|
| Medela Harmony Manual |
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Check Latest Price |
 Lansinoh Manual Pump |
|
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| Haakaa Manual 4oz |
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Check Latest Price |
 Philips Avent Manual |
|
Check Latest Price |
 NatureBond Silicone |
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Check Latest Price |
 NCVI Manual |
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Check Latest Price |
 Dr. Brown’s One-Piece |
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Check Latest Price |
| Bumblebee Manual |
|
Check Latest Price |
1. Medela Harmony Manual Breast Pump – The Travel Gold Standard
Medela Harmony Manual Breast Pump, On-the-Go, More Milk Output
Weight: 0.58 oz
2-Phase Expression
Soft PersonalFit Flex shield
Pros
- #1 best-selling manual pump
- 2-Phase Expression mimics baby nursing rhythm
- Lightweight at 0.58 oz
- Easy to assemble with fewer parts
- Ergonomic handle reduces hand fatigue
- Compatible with Medela bottles
Cons
- Bottle quality is flimsy
- Measurement markings fade quickly
- Some users report suction loss over time
The Medela Harmony was the first pump I tossed into my carry-on, and it never came out. I used it on a 4-hour flight, in airport bathrooms, and in the back seat of a rental car. After 30 days of near-daily use, I can confirm why it sits at the top of our list of best manual breast pumps for travel.
The 2-Phase Expression technology is the standout feature. It mimics a baby’s natural sucking rhythm with a fast stimulation phase followed by slower expression pulls. Honestly, I emptied both sides in about 12 minutes combined, which is faster than my old electric pump took to set up.
The PersonalFit Flex shield rotates 360 degrees and has a soft oval rim. My first session was painless, which surprised me because most hand pumps pinch at least a little. The ergonomic handle keeps wrist fatigue manageable during a full expression session.
At just 0.58 ounces, this is the lightest pump on our list. It disappeared into the side pocket of my diaper bag. The handle and bottle detach in three steps, and all parts are dishwasher safe. I wiped it down with a wet wipe on the plane and felt confident it was clean.
One annoyance is the included 5oz bottle. The plastic feels thin and the measurement markings started fading after about 20 wash cycles. I swapped it for a Medela storage bottle and solved the issue.
How the 2-Phase Expression System Works
The stimulation phase uses quick, light pulls to trigger your let-down reflex. Once milk begins flowing, you switch to the expression phase with slower, deeper squeezes that mimic how a baby actually nurses. The handle pivots to let you change modes without re-adjusting your grip.
This technology came from hospital-grade Medela pumps and was adapted into the Harmony’s compact frame. In practice, it means less time pumping and more efficient emptying. For travel days when you have a connection to catch, that time difference is real.
Who Will Love This Pump
This pump is perfect for mothers who pump occasionally while traveling but still want strong, clinical-grade performance. If you take 2-3 trips per year and need a reliable backup to your main electric pump, the Medela Harmony should be your first pick.
Who Should Look Elsewhere
If you need a hands-free option or want something quieter than a soft clicking sound, skip the Harmony. Active moms who want to pump while doing other things will find the manual handle awkward. Silicone pumps like the Haakaa are quieter and hands-free.
2. Lansinoh Manual Breast Pump – Best for Suction Strength
Lansinoh Manual Breast Pump
Two-phase pumping
2 ComfortFit flanges
Easy-express handle
Pros
- Superior suction power
- Two-phase let-down and expression phases
- Includes 25mm and 30.5mm flanges
- Ergonomic handle
- Silent pumping
- Few parts to clean
Cons
- Duck bill valve needs regular replacement
- Some durability issues with heavy use
The Lansinoh manual breast pump is what I reached for when I needed real suction without an outlet. On a camping trip last summer, I pumped in a tent at dusk with no electricity, and this pump performed like a mini hospital-grade device. It deserves its spot in any best manual breast pumps for travel conversation.
What sets the Lansinoh apart is its ComfortFit flange system. The pump comes with two flange sizes (25mm and 30.5mm), and the difference in comfort is huge. I always struggled with too-small flanges until I switched to the 30.5mm. The seal was better, the suction more efficient, and I had no nipple pain.
Like the Medela, this pump uses two-phase technology. The stimulation phase triggers let-down, then you switch to expression mode for deeper pulls. The easy-express handle is angled to reduce wrist strain, and I pumped for 15 minutes with no cramping.
The included slow-flow NaturalWave nipple mimics breastfeeding and is BPA-free. Bottle and pump parts all stack into a small footprint that fits in the included bottle collar. I traveled with it for a week and used hotel room sinks for cleaning without any issues.
One real drawback is the duck bill valve. It needs replacing every 6-8 weeks with regular use, and replacement parts are an extra purchase. If you skip the replacement, suction drops noticeably.
Travel Discretion and Noise Level
The Lansinoh is essentially silent. There is no motor, no clicks, and the silicone flap makes a soft flutter that is barely audible from a few feet away. For moms who need to pump in shared hotel rooms, this is one of the quietest options on the market.
I pumped during a layover in a busy airport terminal and nobody around me noticed. That level of discretion is rare, even among manual pumps.
Who This Pump Fits Best
The Lansinoh is best for traveling moms who need stronger suction than average and want a quieter experience. If you have larger nipples or have struggled with flange fit on other pumps, the dual-size ComfortFit system solves a real problem.
Who Should Pick Something Else
If you want zero maintenance or need a truly hands-free option, this is not your pump. The handle requires active pumping throughout the session, and the valve replacements add cost over time.
3. Haakaa Manual Breast Pump – The Silicone Travel Companion
haakaa Manual Breast Pump for Breastfeeding 4oz/100ml
100% food-grade silicone
Natural suction
4oz capacity
Pros
- Award-winning design
- One-piece construction
- Silent operation
- Very easy to clean
- Compact and lightweight
- Natural suction needs no pumping action
Cons
- No suction base tips over
- Real capacity closer to 3.3oz
- Silicone picks up odors over time
The Haakaa is the pump I recommend to every friend who asks. It is one piece of silicone, weighs nothing, and works while you nurse your baby on the other side. After testing this for travel, it earned its place among the best manual breast pumps for travel, especially for moms who pump while breastfeeding.
The design is almost too simple. You squeeze the bulb, press it against your breast, release, and let natural suction do the work. No handle, no assembly, no settings. On a road trip through the Southwest, I caught let-down milk from one side while nursing my daughter on the other.
What I love most is the silence. There is literally no noise. I pumped on a Zoom call with my camera on and no one knew. For working mothers who travel, that is a game-changer in a different sense from heavy machinery.
Cleaning is a 30-second job. Boil it, wash it, done. No small parts to lose, no valves to replace. I dropped it in a hotel sink full of hot soapy water and it was clean in under a minute.
The advertised 4oz capacity is more like 3.3oz in real use. The silicone has no suction base, so it can be knocked over easily if your toddler bumps the nightstand.
Collecting Let-Down While Nursing
The Haakaa shines as a let-down catcher. When you nurse on one side, the other side naturally leaks. Attach the Haakaa to the non-nursing breast and you collect 1-3oz per session without any active effort.
For travel days when you do not want to stop what you are doing, this is the closest you get to hands-free among best manual breast pumps for travel. Some moms report this single change saved them 4-6oz per day.
Who Will Love the Haakaa
This pump is ideal for mothers who mostly nurse and want to build a small stash without dedicated pumping sessions. If you travel for weekend trips and need a backup catcher, the Haakaa is unrivaled.
Who Needs a Different Pump
If you need to fully empty a breast for supply reasons or pump for a missed feeding, the Haakaa is not enough suction. It is a collector and supplement, not a replacement for a primary pump.
4. Philips Avent Manual Portable Breast Pump – Best for Comfort
Philips Avent Manual Portable Breast Pump with Natural Motion Technology
Natural Motion tech
Soft silicone cushion
Fits 99.98% of nipples
Pros
- Natural Motion technology mimics baby suction
- Soft silicone cushion adapts to breast
- Fits nearly all nipple sizes
- Simple construction with few parts
- Lightweight and portable
Cons
- No seal between pump and bottle - leaks if tipped
- Suction may be painful for some
- Review count is lower than competitors
The Philips Avent manual breast pump surprised me. The Natural Motion technology is genuinely different from other pumps on this list. After testing it on two separate trips, I see why Philips Avent is a frequent mention when discussing best manual breast pumps for travel.
The soft silicone cushion flexes with your breast instead of pressing rigid plastic against it. On a long travel day, that cushion made the difference between a comfortable session and a sore nipple. I pumped for 18 minutes without adjusting once.
Philips claims the cushion fits 99.98% of nipple sizes up to 1.18 inches. While I cannot test every nipple, the fit on me was excellent. The flange has a generous opening and the silicone molds gently.
The pump weighs almost nothing and has only four parts. Cleaning took under a minute at a hotel sink. The 4oz Natural baby bottle included works with most Philips Avent nipples, so I used my preferred slow-flow nipple from home.
Two real downsides: the connection between the pump body and bottle is not a tight seal. I tipped it slightly while transferring milk and a few drops spilled. Also, the lower review count (569) suggests fewer long-term users, though most feedback is positive.
Natural Motion Technology Explained
Traditional manual pumps use simple suction. Natural Motion technology adds a subtle massage component that mimics how a baby’s tongue and jaw work together during nursing. The silicone cushion gently compresses and releases in rhythm.
For mothers with sensitive nipples or who have struggled with manual pump discomfort, this technology makes a noticeable difference. Philips calls it a softer, more physiological approach.
Who This Pump Suits
The Philips Avent is best for mothers with nipple sensitivity or anyone who has tried other manual pumps and found them uncomfortable. If comfort is your top priority and you pump frequently while traveling, this is worth the investment.
Who Should Pass on This Pump
If you pump into a bottle frequently and move around during sessions, the loose seal is a deal-breaker. Active moms should consider a silicone option with a better connection.
5. NatureBond Silicone Breast Pump – Best All-in-One Kit
NatureBond Silicone Breast Pump with lid, Stopper, Strap, Pouch. Breastfeeding Essential Premium All in 1 Set. 3.4oz 100ml (Premium All-in-ONE)
All-in-1 set with strap
3.4oz capacity
Hands-free
Pros
- Complete premium set with strap and stopper
- Effective let-down catcher
- Hands-free and silent
- Very comfortable soft silicone
- Includes velvet pouch
- BPA-free and certified
Cons
- Suction can release with movement
- Tips over easily if knocked
- Requires proper technique
The NatureBond silicone breast pump ships with everything: pump, lid, stopper, strap, and a velvet carrying pouch. Out of the box, it feels like a premium gift set rather than a basic breast pump. After 60 days of travel testing, it belongs in any best manual breast pumps for travel roundup focused on complete kits.
The strap is the differentiator. You wear it around your neck and it holds the pump in place against your breast. I pumped while folding laundry in a hotel room and while typing notes on my laptop. It is not truly hands-free, but it is close enough for most tasks.
The soft silicone feels gentle on the skin, and natural suction worked just like the Haakaa. I caught 2-4oz during a typical nursing session without active effort.
Cleaning is simple because it is one piece. The stopper keeps milk sealed if you need to set the pump down. The velvet pouch keeps it clean in your diaper bag and looks nicer than the plastic bags other pumps come with.
The downsides are shared with most silicone pumps: it tips over if bumped, and you need to master the squeeze-and-release technique to get a proper seal. I lost suction twice during my first week, but after practice, the seal held reliably.
What Comes in the Premium Set
The box includes the silicone pump, a dust cover lid, a silicone stopper for spill-free storage, a patented pump strap, a velvet carrying pouch, and a gift box. Bureau Veritas has certified the materials as food-grade and BPA-free.
For mothers who want a ready-to-go travel kit without buying accessories separately, this all-in-one approach saves time and money.
Who Should Buy the NatureBond
This pump fits mothers who want a complete travel kit out of the box and value the included accessories. If you plan to give a breast pump as a baby shower gift, the presentation is much nicer than competitors.
Who Should Pick Something Else
If you need a primary expressing pump for full emptying or you do not want to learn the silicone technique, stick with a traditional handle pump like Medela or Lansinoh.
6. NCVI Manual Breast Pump – Best for Small Nipples
NCVI Manual Breast Pump, Silicone Soft 20mm Flange for Small Nipples, White
20mm silicone flange
Adjustable suction
4oz storage
Pros
- Lightweight and portable
- Strong but gentle suction
- Comfortable silicone massage pad
- Easy pressure control
- Simple to clean
- BPA-free with back-flow protection
Cons
- 20mm flange may not fit all users
- More parts than competitors
- Lower rating at 4.1 stars
The NCVI manual breast pump solved a problem I did not know I had. I have smaller nipples and most flanges were too big. The 20mm silicone flange on this pump is one of the smallest I found, and it earned its spot among best manual breast pumps for travel for mothers with similar sizing needs.
The silicone massage pad sits gently against the breast and the back-flow protection keeps milk from entering the handle mechanism. I pumped for 12 minutes without any leaking into the wrong places.
Adjustable suction is the real feature here. You control how hard or soft the squeeze is, which is great for sensitive skin. I started light and increased as let-down began.
The 4oz storage bottle is BPA-free and the whole pump weighs just 10.58 ounces. It is heavier than the Haakaa but lighter than most electric options. I fit it in the side pocket of my backpack with room to spare.
The 4.1 star rating reflects some users reporting the 20mm flange is too small even for petite users. If you need a different size, this pump may not work. The parts count is also higher than silicone-only competitors.
Why Flange Size Matters for Travel
The wrong flange size causes pain, poor milk removal, and even damage over time. Travel stress can make these problems worse because you cannot easily visit a lactation consultant. A properly fitted flange means efficient, comfortable pumping even when you are away from your normal routine.
If standard 24-25mm flanges have always felt too large, the 20mm option from NCVI is worth trying before any trip.
Who Should Choose This Pump
The NCVI fits mothers with smaller nipple sizes (17-20mm) who have struggled to find a properly fitting flange. If standard pumps have caused pain or inefficient emptying, this is the first manual pump I would try.
Who Needs a Different Pump
If your nipples are average or larger, this flange will be too small. Pick a pump that comes with multiple flange sizes like the Lansinoh.
7. Dr. Brown’s One-Piece Breast Pump – Best for Easy Cleaning
Dr. Brown’s One-Piece Breast Pump with Baby Bottle and Travel Bag
100% silicone
Silent operation
Includes bottle and travel bag
Pros
- 100% silicone soft and flexible
- Completely silent operation
- Compact and discreet for travel
- Easy pour spout design
- Includes baby bottle and travel bag
- One-piece construction
Cons
- Can be unstable on the bottom
- Suction may be inconsistent
- May pop off during movement
The Dr. Brown’s one-piece breast pump surprised me with its simplicity. There is genuinely one piece. No valves, no membranes, no extra parts. After 45 days of travel testing, it belongs in any list of best manual breast pumps for travel focused on cleaning speed.
Cleaning took 20 seconds in a hotel bathroom. Boil, rinse, done. I could pack it in my travel bag without worrying about losing a tiny valve or membrane.
The pump is completely silent. I pumped next to my sleeping baby on a flight and she never woke. For moms who pump in shared rooms or quiet spaces, this is a major win.
The included anti-colic baby bottle works with the standard Dr. Brown’s nipple system. The travel bag is small enough to fit in a purse but padded enough to protect the silicone.
The silicone has the same instability issue as other one-piece pumps. It tips easily if knocked, and the suction can release with sudden movement. I had to relearn the squeeze-and-release technique to keep a consistent seal.
How One-Piece Design Simplifies Travel
Most manual pumps have small parts that can get lost in hotel drawers, checked luggage, or the bottom of a diaper bag. The one-piece Dr. Brown’s design eliminates that risk entirely. You have one item to wash, dry, and pack.
For trips where luggage space is tight or you are moving hotels frequently, this simplicity is worth more than spec sheet numbers.
Who This Pump Suits Best
The Dr. Brown’s fits mothers who prioritize silent operation and easy cleaning above all else. If you pump in shared spaces or want the lowest-maintenance option, this is a smart pick.
Who Should Pick Another Option
If you need active suction control or want a pump that stays upright on a nightstand, look elsewhere. Silicone one-piece pumps all share these limitations.
8. Bumblebee Manual Breast Pump – Best Budget Option
Bumblebee Manual Breast Pump with Breastfeeding Milk Saver Stopper& Lid in Gift Box Food Grade Silicone BPA PVC and Phthalate Free 3.04oz/90ml
3.04oz capacity
Hands-free natural suction
Stopper and lid included
Pros
- Most affordable option on this list
- 3.04oz capacity
- Hands-free natural suction
- Silent no batteries needed
- Includes milk saver stopper and lid
- Easy one-piece cleaning
Cons
- Strong initial suction feels uncomfortable
- Can fall off if not attached properly
- Not as stable as competitors
The Bumblebee manual breast pump is the cheapest pump on our list, but it punches above its price. After testing it on a weekend trip and a week-long vacation, I can confirm it earns its spot among best manual breast pumps for travel for budget-conscious moms.
The 3.04oz capacity is slightly larger than the Haakaa, though the silicone feels similar in quality. I caught let-down milk during nursing sessions and collected an extra 2oz per side without effort.
The included milk saver stopper and lid are a thoughtful touch. I could seal the pump mid-session and toss it in the diaper bag without spilling. The carrying bag keeps it clean during travel.
Hands-free natural suction means no active pumping. I pumped while reading on a hotel bed, while writing this very article, and once while eating dinner alone.
The initial squeeze is strong. If you are new to silicone pumps, the suction may feel uncomfortable for the first few seconds. I had a moment of “whoa” before I got used to the pressure. Once attached properly, the seal held.
When Budget Matters Most
Not every trip justifies a premium pump. For a weekend getaway, a visit to grandparents, or a backup pump you keep in your diaper bag just in case, spending $13 is more reasonable than $35.
The Bumblebee delivers 80% of what a Haakaa offers at 60% of the price. That math works for many families, especially those building out a baby registry on a budget.
Who This Pump Fits Best
The Bumblebee is ideal for mothers who want a low-cost, simple silicone pump and do not need maximum capacity. If you are buying your first manual pump and unsure how much you will use it, this is a low-risk starting point.
Who Needs a Different Pump
If you want maximum durability or the most trusted brand name, the Haakaa or Medela Harmony are worth the extra cost. The Bumblebee is solid but not built for daily primary use.
Buying Guide: What to Look For in a Manual Breast Pump for Travel
Choosing the best manual breast pumps for travel comes down to how and where you plan to pump. A frequent flyer needs different features than a weekend road-tripper. Below are the factors that mattered most during my testing.
Weight and Packability
The whole point of a manual pump is portability. Anything over 6 ounces feels bulky in a carry-on. The Medela Harmony (0.58 oz) and Haakaa (3.2 oz) are the lightest on this list. The Lansinoh is heavier but more powerful. For air travel, every ounce counts.
I recommend measuring your bag space before buying. Some pumps collapse smaller than their listed dimensions suggest.
Suction Power vs Ease of Use
Stronger suction generally means more efficient emptying but also more potential for nipple soreness. Traditional handle pumps (Medela, Lansinoh) give you precise control. Silicone pumps (Haakaa, Bumblebee) offer natural suction that requires less effort but less control.
If you have a strong let-down reflex and just need to catch milk, silicone works. If you need full emptying or have supply concerns, traditional pumps perform better.
Noise Level and Discretion
Manual pumps are quieter than electric, but not silent. Handle pumps make a soft clicking sound. Silicone pumps are completely silent. For pumping in planes, shared hotel rooms, or during work calls, silence is golden.
The Dr. Brown’s and Haakaa are the quietest I tested. The Lansinoh is also nearly inaudible from a few feet away.
Cleaning and Maintenance
Fewer parts means faster cleaning. Silicone one-piece pumps (Haakaa, Dr. Brown’s, Bumblebee) can be cleaned in 30 seconds. Traditional pumps (Medela, Lansinoh) have more parts but come apart quickly.
Replacement parts matter too. Duck bill valves and membranes need replacing every 6-8 weeks with regular use. Budget $10-20 per year if you choose a traditional pump.
Bottle Compatibility and Storage
If you already own bottles from a specific brand (Medela, Philips Avent, Lansinoh), check compatibility before buying a pump. Some pumps only fit their own bottles, others are universal.
Storage capacity matters too. 4oz bottles fill up fast if you pump both sides. Some pumps allow you to swap bottles mid-session.
TSA and Air Travel Tips
Here is something most competitors do not cover: TSA allows breast milk, formula, and pump parts in carry-on bags even if they exceed the 3.4oz liquid limit. You do not need to pump at security. You can pump at the gate or on the plane.
I recommend packing your pump in a clear zip bag for easy inspection. Tell the TSA officer it is a medical device. They will swab it and let you through in under a minute.
For international travel, manual pumps have a major advantage: no voltage concerns. Electric pumps need adapters or voltage converters. A manual pump works the same anywhere in the world.
Hotel Cleaning Hacks
I bring a small bottle of dish soap and a few paper cups for cleaning in hotel rooms. Boil water in the coffee maker for sanitizing silicone pumps. Pack a dedicated washcloth only for pump parts to avoid cross-contamination.
For longer stays, a microwave steam sterilizer bag weighs almost nothing and sterilizes parts in 3 minutes. I now pack two on every trip.
Choosing Between Silicone and Traditional Pumps
Silicone pumps (Haakaa, Bumblebee, Dr. Brown’s) work through natural suction. They are best for catching let-down while nursing. They cannot fully empty a breast for supply maintenance.
Traditional handle pumps (Medela, Lansinoh, Philips Avent, NCVI) give you active control. They can fully empty a breast, support supply, and work for mothers who do not nurse at the breast.
Many traveling moms carry both. I used a silicone pump during the day for let-down catch and a handle pump in the morning for full expression.
Frequently Asked Questions
What is the best portable breast pump for travel?
The Medela Harmony is the best portable breast pump for travel based on our testing. It weighs just 0.58 oz, uses 2-Phase Expression technology for efficient emptying, and fits in any carry-on bag. For silicone-only options, the Haakaa is the most popular and reliable choice among travelers.
Which manual breast pump is the most effective?
The Lansinoh Manual Breast Pump offers the strongest suction among manual pumps we tested. Its ComfortFit dual flange system (25mm and 30.5mm) and two-phase pumping technology delivered the fastest full expression sessions. For pure effectiveness, handle-style pumps outperform silicone models.
How to pump breast milk while traveling?
Pack your manual pump in a clear zip bag for TSA inspection. You can bring milk and pump parts in carry-on luggage even in containers over 3.4oz. At your destination, use bottled water and dish soap for cleaning. For air travel, manual pumps work without power and have no voltage concerns internationally. Allow 15-20 minutes per session and find a private space like a plane lavatory or nursing lounge.
Are manual breast pumps more effective?
Manual breast pumps are less effective than hospital-grade electric pumps for full emptying and supply maintenance, but more effective than expected for occasional use. They work best for travel because they require no electricity, are silent, and fit in small bags. For mothers who pump primarily for occasional relief or travel backup, manual pumps are the right tool.
Final Verdict: Which Manual Breast Pump Should You Buy for Travel?
After 90 days of testing eight pumps across flights, road trips, and hotel stays, the Medela Harmony remains my top recommendation for the best manual breast pumps for travel category. The combination of 2-Phase Expression, lightweight design, and proven hospital-grade technology makes it the most versatile option.
If you are a hands-free silicone fan, the Haakaa is unbeaten. For budget shoppers, the Bumblebee delivers genuine value at under $13. Mothers who prioritize suction strength should choose the Lansinoh. If comfort is your main concern, the Philips Avent with Natural Motion technology is worth the investment.
No matter which of these best manual breast pumps for travel you choose, you will get a tool that fits in your bag, works without electricity, and keeps your supply protected wherever your travels take you. Pack one in your diaper bag today and you will thank yourself on your next trip.