Convenient travel water bowl for pets. To make a handy lightweight bowl, cut off the bottom third of an empty gallon jug. Take another empty gallon jug and fill it with water. The “bowl” will fit snugly over the bottom of the water jug, which makes it convenient to bring both the water and the bowl on a hunt.
Check out this water bottle - one side for your drink and the other for your dog's water. Comes with collapsible travel cup for your dog too http://www.dfordog.co.uk/h-duo-dog-water-bottle-travel-cup.html