A 3-1-1 liquids bag holds travel-size containers (3.4 oz/100 mL each) in one clear quart-size pouch—only one pouch per passenger.
Travel moves faster when you pack the liquids pouch the right way. This guide spells out what belongs in that clear quart-size bag, what stays outside it, and how to dodge last-minute bin reshuffles at the checkpoint. You’ll get plain rules, edge cases buyers miss, and a packing method that works every time.
What “Counts” Inside The Quart-Size Liquids Bag
If it pours, pumps, squeezes, smears, sprays, or spreads, it goes in the pouch in containers up to 3.4 ounces (100 mL). That includes liquids, gels, creams, pastes, aerosols, and roll-ons. Solid sticks, wipes, and standard powders aren’t part of the pouch. See the common callouts below.
| Item Type | Does It Go In The Pouch? | Notes |
|---|---|---|
| Shampoo, conditioner, body wash | Yes | Each bottle ≤ 3.4 oz / 100 mL |
| Toothpaste, mouthwash | Yes | Travel size only |
| Moisturizer, sunscreen, makeup liquids | Yes | Treat lotions, liquid foundation, and serums as liquids |
| Deodorant (aerosol or gel) | Yes | Counts as aerosol/gel |
| Deodorant (solid stick) | No | Pack outside the pouch |
| Hair spray, dry shampoo spray | Yes | Aerosol travel size only |
| Dry shampoo powder | No* | See powder note below |
| Lip gloss, mascara | Yes | Small tubes still count as liquids |
| Bar soap | No | Solid bars stay outside the pouch |
| Contact lens solution | Yes | Unless using medical allowance |
| Food spreads (peanut butter, hummus) | Yes | Treat as a spreadable paste |
| Baby wipes | No | Wipes are solids |
Rule In One Minute
The pouch holds travel-size containers up to 3.4 ounces (100 mL) each. All those containers must fit in one clear, resealable, quart-size bag. One bag per flyer. Keep it reachable, since many lanes ask you to remove it for X-ray. Full-size bottles in carry-on will be pulled. See the official TSA liquids rule for the exact wording.
Carry-On Liquids Bag — Close Variation And Practical Angle
Call it a quart pouch, a clear cosmetics bag, or a TSA liquids bag. The goal is the same: quick screening and less clutter. A tight edit helps. Decant only what you’ll use, choose leak-proof minis, and group like items. A neat pouch clears faster than a stuffed one.
Container Size Myths That Cause Bag Pulls
“Half-Empty Big Bottles Are Fine”
Screening looks at labeled capacity, not the fill level. A 6-ounce shampoo bottle that’s half full still exceeds the limit. Transfer into a 3-ounce travel bottle or move it to checked baggage.
“Quart Means Exact Dimensions”
Screeners care about capacity and clarity, not a single set of inches. Most store-bought quart pouches around 6×9 or 7×8 inches pass. If the bag bulges or won’t seal, expect a repack.
“Aerosols Don’t Count If Small”
Sprays and foams are part of the liquids rule. Pack mini hairspray, shaving foam, or dry shampoo spray in the pouch. Button-lock caps help stop leaks at altitude.
What Stays Outside The Pouch
Sticks, wipes, and solid bars ride in carry-on with no size limit under the liquids rule. That includes solid deodorant, bar soap, and makeup sticks. Powders can stay outside the pouch too, with a screening note below.
Powder Screening Note
Powder-like items over 12 ounces (350 mL) may need extra screening. Keep larger tubs in a checked bag to avoid delays. Smaller jars, spice tins, and makeup pans tend to sail through when packed tidy.
Edge Cases That Trip Travelers
Semisolids And Spreads
Peanut butter, soft cheeses, and yogurt move like gels. Those belong in the pouch in travel-size containers. Pack picnic jars in checked luggage.
Contacts And Saline
Standard bottles up to 3.4 ounces fit the rule. Flyers with dry-eye drops or larger saline can use the medical allowance described below.
Makeup And Toiletries
Liquid foundation, BB creams, nail polish, and setting spray count. Lipstick sticks and powder compacts stay outside the pouch. Mascara and liquid eyeliner go inside it.
Shaving Gear
Travel-size shave cream or gel belongs in the pouch. Safety razor handles may fly with blades removed. Disposable razors fly with their fixed blades. Loose blades go in checked bags.
Medical And Baby Exceptions
Airports allow larger amounts of medically needed liquids, gels, and aerosols in “reasonable quantities.” Declare them at screening and keep them separate from the pouch. Baby formula, breast milk, and juice for infants also qualify. Ice packs and gel packs used to keep those items cool can be larger than travel size. Pack them where officers can see them to speed up the check. Read the TSA page on the medical liquids allowance for specifics.
Packing Method That Always Works
- Lay out all liquids, gels, creams, pastes, and sprays you plan to carry.
- Move anything larger than 3.4 ounces into checked baggage or decant into travel bottles.
- Group the rest by use: face care, body, hair, makeup, and food items.
- Seal each cap with a small strip of tape; add a tiny stretch of plastic wrap under caps prone to leaks.
- Load containers upright in the clear bag and test the zipper; if it won’t close, remove least-used items.
- Stage the pouch at the top of your carry-on so it comes out in one move at the bins.
Checkpoint Tips That Save Time
- Use refillable minis with printed sizes. Officers can read the volume at a glance.
- Skip perfume glass in carry-on. A small atomizer travels better and meters each spray.
- Pre-stage the pouch with your laptop section so both come out in a single motion where lanes still require removal.
- Traveling with kids? Place formula or milk in its own tote with ice packs on top for easy inspection.
- In CT lanes that scan bags in 3D, you may leave the pouch inside the bag. Size limits still apply.
Common Mistakes And Quick Fixes
Poor Labeling
Unmarked travel bottles slow things down. Add simple labels or carry the original mini where possible.
Over-Packing The Pouch
Stuffed bags pop open and leak. Trim to a single daily routine and a tiny makeup set. Share hair products with your travel partner to cut duplicates.
Forgetting The Food Rule
Nut butters, dips, and soft cheeses count as spreads. Pack single-serve cups in the pouch or switch to solid snacks.
Full-Size Aerosols In Carry-On
Salon cans belong in checked baggage. Bring travel minis with protective caps to meet both size and safety guidance.
Where Each Item Belongs
Use this guide to place tricky items before you leave home. When in doubt, scale down the container or move it to checked baggage to save time.
| Item | Carry-On (Outside Pouch) | Checked Bag |
|---|---|---|
| Solid deodorant, bar soap | Yes | Yes |
| Liquid foundation, mascara | Pouch only | Yes |
| Aerosol hairspray (full size) | No | Yes (caps on) |
| Protein powder 16 oz tub | Screening may delay | Best choice |
| Contact solution 12 oz | Medical allowance | Yes |
| Peanut butter jar | Pouch if travel size | Best choice |
| Baby formula or breast milk | Allowed beyond travel size | Yes |
Smart Shopping For The Pouch
Pick bottles that state 3.4 oz or 100 mL on the mold so the size is clear. A wide-mouth design fills faster in a hotel sink. Flip-caps with a snap lock resist cabin pressure burps. Choose a clear bag with a firm zipper and flat sides; gusseted bottoms stack cleanly.
Leak Control
Use travel sleeves or a small zip bag around anything that stains: tanning drops, hair dye, nail polish remover. A spare contact case is an easy decant for tiny amounts of cream or gel.
Refill Strategy
Keep a small tote at home stocked with clean empties and a funnel. After a trip, rinse, dry, and refill right away so your next pack is a grab-and-go.
Step-By-Step Morning Load-Out On Travel Day
- Shower, then fill tiny shampoo or leave it if you prefer the hotel brand.
- Move fresh toothpaste and face wash minis into the clear bag.
- Drop in makeup liquids and mascara; leave sticks and powders outside the pouch.
- Add any sprays in travel size. Check for caps and locks.
- Stage medication liquids and baby items separately to declare at the lane.
- Zip the pouch fully. If it strains, remove backups until it shuts cleanly.
When Rules Differ Abroad
Most regions mirror the 100 mL cap and a one-liter clear bag. Some airports with CT lanes let you leave the pouch inside your bag during screening. Size limits still apply unless posted otherwise. On return flights to the U.S., expect the same 3.4-ounce limit.
Quick Reference: What Belongs In The Pouch
- Liquids and gels: shampoo, body wash, lotion, makeup liquids
- Sprays and foams: hairspray, shaving foam, spray deodorant
- Creams and pastes: moisturizer, sunscreen, toothpaste, nut butters
Outside the pouch: solid deodorant, bar soap, makeup sticks, wipes, and most powders. Larger medical liquids and baby needs are allowed beyond travel size when declared.
Source-Backed Rules In Plain Words
The liquids rule allows a quart-size bag filled with small containers up to 3.4 ounces each. That bag rides in carry-on, one per person. Large medical liquids and infant needs can exceed travel size when declared. Powder containers at or above 12 ounces may face extra screening. Links above point to official pages that match this guidance.