One hand watering- design the drinking trough and the water container one bottle. Just one simple press, the water will flow out smoothly. An arc trough designed to fit their living habit, making it easier for them to drink. BioCleanActTM as the main material of the top cup because of its continuous.inhibition of the bacteria growth in the open drinking troug One-hand watering function, Pet Waste Bags function and training tool function all in one Available Color: Green,Yellow,Blue&Pink