The amount of liquid you can take on a plane depends mainly on the airport and country regulations, but generally follows the TSA's 3-1-1 rule:
- Liquids must be in containers of 3.4 ounces (100 milliliters) or less each.
- All liquid containers must fit into one clear, resealable quart-sized bag (about 32 ounces in volume).
- Each passenger is allowed only one such quart-sized bag.
This means in total you can carry roughly up to 32 fluid ounces of liquid on the plane if packed correctly in containers of 3.4 ounces or less. However, some airports are adopting newer scanner technology that allows passengers to bring larger containers (up to 2 liters each) without removing them from their bags. For example, Edinburgh and Birmingham airports in the UK allow liquids in containers up to 2 liters and with no limit on the number of such containers. Other airports are still enforcing the traditional 100ml per container and quart bag limit. There are also exceptions for medically necessary liquids (no strict quantity limit but must be declared and screened) and liquids purchased after security like duty-free items, which can exceed the usual limits. In summary, the typical answer for most airports including TSA rules in the US is one quart-sized bag with containers no larger than 3.4 ounces, totaling about 32 fluid ounces. But some airports in the UK have newer rules allowing larger volumes up to 2 liters per container with no quantity limit.
