Question: how much water can you take on a plane?
Answer: “According to TSA liquids rule, each passenger can carry liquids, aerosols and gels in containers of 3.4 oz. (about 100 mL) or less, inside one quart-sized clear plastic (such as Ziploc) bag in the carry-on bag.” Make sure that the bag is not more than 1 liter in capacity.