Ever try to clean oatmeal or protein powder out of a traditional water bottle? Not fun. That's where the ALEX comes in: It twists apart at the center, so you can easily get a sponge or brush into the crevices. It comes in two sizes—20-ounce and 32-ounce—but you can mix and match the tops and bottoms to get a 26-ounce bottle, too.
To buy: ALEX Bottle, starting at $26