The product is an excellent way to keep your pet's water stores mobile. Originally designed for hunters, this portable water bowl holds up to 3.5 (7") or 5.0 (10") gallons of water. To use the unit, lift the handle end and remove the rubber plug. There's a small recess to store the plug on the bottom of the container when not in use, so your dog won't chew it. When the Dash is on the ground with the plug removed, the bowl area will fill with water. When the dog starts drinking, water will continuously backfill to ensure they don't run out. When it's time to go, tilt the unit up to return leftover water inside the carrier and push the plug back in place. It's great for trips to the woods, field, vacation, or even as a regular water station at home. The product is designed with the same process as military cargo cases and industrial tanks, so it is tough. Toss it in the back of the truck without worrying that it will crack or break. The Dash's polyethylene plastic construction is not only durable but safe. The water bowl is both BPA-free for contact with edibles.