Drinkwell Hydro-Go Pet Canteen - is the first and only pet canteen with a fold-out funnel bowl. The bowl and canteen work together to form a funnel, easily allowing any unused water to be poured back into the canteen. The Hydro-Go is a great product for those who enjoy hiking, walking, camping, fishing, hunting, car trips, visits to the park or any other place you and your pet may go. More importantly, it ensures that you have enough water when you and your pet are away from home!