PED PAW Automatic Cat Feeder, Food and Water Dispenser Set for Dogs, Gravity Feeder Large Capacity 1 Gallon x2 for Small Medium Large Pet with Pet Food Mat

Its a great product to keep my pups watered, the reason for 4 stars is that the top for the water tank is very hard to open with my arthritic fingers. It is meant to be tight but I have to use a lever to open it.