Water is not easy to backflow so it wont get dirty. Marukan rabbit water bottle 10.1 fl oz (300 ml); Target rabbits, chinchilla, etc. Features: A water supply device with a double layer structure and a smooth flow of water. The suction port has 2 stainless steel balls inside, which prevents backflow and keeps the bottle clean. You can reuse plastic bottles (6.8 - 16.9 fl oz (200 - 500 ml) of commercially available drinking water. Comes with a hanging hole so you can hang it from the top of the surface. Quantity: 1 piece; Size (W x D x H): Approx. 2.2 x 3.3 x 8.7 inches (55 x 85 x 220 mm); Capacity: 10.1 fl oz (300 ml); Material: Bottle body: PVC; Nozzle holder; Stopper: Polypropylene; Suction hole: Brass plated; Suction ball: Stainless steel; Gasket: Rubber. Country of Origin: Taiwan Note: This product is a water supply for small animals. Do not use for any other purpose. Please tighten the nozzle or suction before using. Loosen or misalignment of the gasket may cause water to leak. Do not place near fire or heating appliances. This may cause fire, pet burns, and product deformation. Please note that some plastic bottles do not match the diameter or shape. Depending on the cage, some items cannot be installed. Do not use plastic bottles that are over 16.9 fl oz (500 The weight of the water may damage the product or the breeding supplies. Avoid installing in places where sunlight gets in, or in places where temperature changes during the day are severe or air conditioners. This may cause water to leak or stop water. The water pressure inside the thin and soft material of the plastic bottle will instabilitate the water pressure, and it is prone to "water leakage". When attaching to a cage, please make sure to return it back to use. Please make sure that water comes out every day.