Isn't it frustrating when you're on your way to the airport and you have your favorite beverage (hopefully that's healthy water!) with you, but once you get to the security line you realize you have to throw it away when you've drank only half of it? Then, once you've made it through the mad dash of the x-ray, liquids screening and occasional luggage rummage and into the terminal, you're even thirstier from all that action. (Kudos to the TSA for keeping us all safe!) But now you're forced to choose from the limited selection of overpriced bottled water and sugary beverages in your confined waiting area. Even worse, once you're on the plane, you're at risk for dehydration - and at the mercy of the flight attendant who is busy trying to serve you and 200 other passengers.