Introducing the Dog is Good Pet Water Bottle!  This BPA-free, stainless-steel, patent-pending water bottle has two openings: the small one up top has a ball-bearing to control water flow when you hold the bottle upside-down for Dog to drink (think hamster water bottle and you're on the right track). The second opening is larger to allow for filling cleaning and get this - un-screw the whole top of the bottle and flip it over - and it's a cup! 

Did we mention there's a carabiner to latch this 24 oz. bottle onto your pack? Or that this Pet Water Bottle fits in most standard cup-holders so it won't go rolling around the floor of you car?  Top all of that off with the happy, go-lucky, Bolo logo dog design and you've got everything you need. Yup -it's as close to perfect as it gets for an on-the-go dog hydration system for under $25.