This would be a great cup, but it has a fatal flaw. The soft plastic bit that fits in the lid, that keeps the water from pouring out, falls out at the least impact. So when my toddler drops (or throws) the cup on the floor -- which she does frequently, being a toddler -- the plastic bit comes loose and ends up in the cup, and then the water spills out onto the floor. It is extremely irritating, and frustrating as otherwise the cup is really nice (well-designed handles, etc.). But this makes it pretty much useless.