Title: Easy and useful
Review: I love the Gulpy. It's easy to use, and my dog took to it with no instruction necessary. Rarely leaks if you make sure to screw it tightly. If you have a small dog, you might consider getting the smaller size, because it is easier to throw in a bag (I wish I'd done this). Only criticism is the colors are kind of ugly; we were randomly sent yellow, and it's not too bad, but I feared that pink something awful!
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