Question: how much are you allowed to take on a plane?
Answer: According to TSA's official page, you're allowed to bring a quart-sized bag of liquids on a plane. Each liquid container should be equal or less than 3.4 ounces (100 ml) per item. The TSA liquids rule is also called the 3-1-1 rule, since you're allowed to bring: 3.4-ounce container.