Most water bottles hold one thing- water. But the Contigo Sports Bottle takes it a step further by adding a compartment to the side of the bottle that can be used to hold your keys, money, or credit cards. It has all sort of lovely water bottle features like being leakproof, spillproof, BPA free and with a wide neck for loading with ice cubes. With the unfortunate amount of spandex I see jogging around my neighborhood, this would be a welcome alternative to the fannypack. You could also store instant drink packets in the compartment, that would be handy. Good idea as long as you don’t misplace your water bottle.