Doog Blue foldable portable waterbowl: Make sure your dog keeps their fluids up on a walk with these ingenious lightweight bowls. They fold up so that you can clip them onto your Walkie Belt or stick one in your back pocket. They're easy to assemble. Just use the poppers in the corners to construct the bowl from flat and then fill with water. Sizing: flat: 12cm in diameter. Folded size: 5-7cm in diameter. Weight: 30 grams