TSA rules allow liquids, gels, and aerosols in carry-on bags limited to 3.4 fl oz (100 ml) per container, all fitting into one quart-sized (about 32 fl oz total capacity), clear, zip-top plastic bag per passenger.

Core 3-1-1 Rule

The "3-1-1" standard—3.4 oz max per item, 1 quart bag, 1 bag per person—has been standard since 2006 for US flights and is mirrored internationally (e.g., EU's 100 ml rule). You can pack around 7-10 such containers (roughly 22-32 fl oz total liquid) if they fit snugly without bulging the bag. Larger bottles go in checked luggage only, with no oz limit there.

International Variations

  • UK/EU : Same 100 ml max, 1-liter bag; post-Brexit UK aligns closely.
  • Canada/Australia : Matches TSA at 100 ml per item in a 1L bag.
  • Asia (e.g., China, Japan) : Often stricter enforcement, sometimes requiring freeze-packs for meds. Always check airline-specific rules for your route.

Common Exceptions

  • Medications/Baby formula : Larger amounts allowed if declared; bring doctor's note for Rx liquids.
  • Duty-free liquids : Permitted in sealed bags (STEB) bought airside, but can't access until final destination.
  • Solid-to-liquid (e.g., ice packs) : Must be frozen solid at screening.

Scenario| Carry-On Limit| Checked Bag Limit
---|---|---
Toiletries (shampoo, lotion)| 3.4 oz each, 1 qt bag 1| Unlimited 7
Alcohol (<24% ABV)| 3.4 oz each, 1 qt bag 5| Up to 5L per bottle 10
Meds (liquid)| As needed, declare 5| Unlimited 7

Traveler Tips from Forums

Reddit users emphasize: "Fit as many as your Ziploc holds—TSA doesn't count oz, just bag fit." One shared losing sunscreen in a 120 ml bottle despite partial fill—label capacity rules. Pack creams/gels separately to avoid spills; buy post-security if possible.

TL;DR : Max ~25-32 fl oz total via 3.4 oz containers in one 1-qt bag for carry-on; no limits checked.

Information gathered from public forums or data available on the internet and portrayed here.