Never forget Fido’s drinking source at home again—and lighten your pack—with this water dish that can be worn as a collar on the trail. “Conversion to bowl mode is quick and simple,” our tester says. “Undo the two zippers on the top and bottom, expand the material, and pour. I was able to dispense around 16 ounces at a time.” Hefty padding kept his pooch comfortable during rugged hikes through Colorado’s Eldorado Canyon. Tradeoff: The Grrowler’s width and weight mean it’s better suited to medium-to-large dogs than small ones.