Gulpy Pet Water Dispenser
I use this every time we go out for a walk in the summer with Gumbo. With him being a pug, he's prone to heat injury. This ensures he always has a fresh supply of water on the walk. It also clips onto my waist band easily, so there's nothing extra to carry.
I couldn't take him out for walks on those warm days without it. It took him a couple tries to figure out that it had water in the bowl part, but he loves it now. Highly recommended!