For the TSA, which regulates travel in the United States, all liquids, gels, and aerosols must be in containers that are 3.4 ounces (100 milliliters) or less. All liquids must fit into a single, clear quart-size bag — passengers can only pack one of these bags in their carry-on.
Can I put my liquids in my personal bag instead of carry-on?
These are limited to travel-sized containers that are 3.4 ounces (100 milliliters) or less per item. Placing these items in the small bag and separating from your carry-on baggage facilitates the screening process. Pack items that are in containers larger than 3.4 ounces or 100 milliliters in checked baggage.
Can I take 2 clear bags in hand luggage?
You can take one clear bag per person, so it's wise not to bring too much liquid with you, even if it's in containers of less than 100ml. If you use a lighter, you can take one on board in the same clear plastic bag.