Torus Cat Bowl RED (1L)The valve position, when locked, secures stored water inside the walls so you can take TORUS with you wherever you go. Water stored inside the walls ensures an ample supply of water, protected from dust and contaminants. the filter ensures that the water is filtered before it is released in to the bowl. Storing up to 1 Liter (approx. 4 metric cups, 1 Quart or 0. 25 Gallons) of water inside its reservoir walls and ideal for smaller pets. Available in