I WILL be glad to be able to bring my own bottle of WATER on the plane with me (plane water--EW!!!).
AS long as you buy it after security's checkpoint. There are recent regulations about bringing liquids. It's a pain.
With certain exceptions for prescription and over-the-counter medicines, baby formula and breast milk, and other essential liquids, gels, and aerosols, the following rules apply to all liquids, gels, and aerosols you want to carry through a security checkpoint.
All liquids, gels and aerosols must be in three-ounce or smaller containers. Larger containers that are half-full or toothpaste tubes rolled up are not allowed. Each container must be three ounces or smaller.
All liquids, gels and aerosols must be placed in a single, quart-size, zip-top, clear plastic bag. Gallon size bags or bags that are not zip-top such as fold-over sandwich bags are not allowed. Each traveler can use only one, quart-size, zip-top, clear plastic bag.
Each traveler must remove their quart-sized plastic, zip-top bag from their carry-on and place it in a bin or on the conveyor belt for X-ray screening. X-raying separately will allow TSA security officers to more easily examine the declared items.