Travel Tips by: Lifestyle Traveler
The short answer is – yes, you can bring an EMPTY water bottle of any size on a plane.
You can bring an empty water bottle regardless of its size both in carry-on bag and checked bag. The same goes for other containers that you might want to bring.
Note that even if your bottle is bigger than 3.4 ounces but the liquid inside of it is less than this amount, you will still have to empty it first, before going through the security checkpoint.
You can bring water bottles made of glass, stainless steel, or plastic.
If you bring child nourishments or fish supplies, you will be allowed to carry more water with you on the plane.
If you are traveling with your baby, for instance, you will be able to bring breastmilk or baby formula in bottles or containers that exceed 3.4 ounces.
Also, parents will be allowed to bring water for the baby, including boiled, sterile water.
If you want to travel with a live fish, you will also be allowed to bring more than 3.4 ounces of water through the security check.
You will also have to carry your fish in a container that will not spill or leak. It can be a glass or a plastic container, filled with as much water as your fish needs.