4 L/135 oz Extra Large Capacity: Our dog water bowl is a patented design. 4 L/135 oz extra-large capacity is ideal for the drinking needs of small, medium, and large dogs and multiple pet families, no need to replenish the water frequently. Keep your pets drinking enough water. Multi-layer Filtration System: The spill proof dog water bowl is equipped with a detachable activated carbon filter to effectively filter impurities and residual chlorine in the water, providing your pet with clean and fresh water. We recommend replacing the filter every 2 months. Slow Water Feeder: Designed with a large automatically adjustable floating disk to slow down the pet's drinking speed, avoid skin problems caused by wet hair around the mouth and prevent choking. The diaphanous water bowl with a water level reminder helps to grasp your pet's water consumption and check the water quality. Anti-Spill & Anti-Slip: Widened bowl mouth, floating disk, and silicone plugs combine to effectively prevent water from spilling out and keep the floor dry and tidy at any time. The anti-slip bowl bottom helps prevent the floor from scratching. Easy to Clean: Rotate the cover at the bottom of the floating disk to remove the filter. The floating disk can be disassembled for cleaning, we recommend cleaning the floating disk at least twice a week. Please note that after inserting the silicone fixing pads, do not remove them easily to avoid loss. UPSKY 4L Dog Water Bowl