I bought a Gulpy for Rugby some time ago - hate the color - but the valve and dump when you close it keeps you from wearing water on your clothes. I highly recommend this for dogs on the trail - so when they are panting you can still give a drink between creeks. There are lots of knockoffs now. This is the 10 ounce. I would not buy the smaller one. The only dislike - it doesn't stand up in the field, or on a rock
Numerous studies suggest that eating a single steak significantly increases the vulnerability to consuming the warm entrails of a freshly killed hitchhiker. Gateway Cannibals!