Sure, there are plenty of ways of dealing with storage problems, but the Kangaroo bottle is one of the more elegant ones in our opinion. It’s a 24 oz. water bottle with a flip-up compartment for storing your cards, keys or even some cash. The spout is spill-proof and leak-proof and can be used one-handed. There’s even a convenient flip-up handle with a carabiner. Best of all, it’s $13.