Pure Crystal 800ml Petit for Dogs Dog Filter Water Dispenser Brand new, unused. Allows your dog to drink clean and delicious water at any time. Instructions: ● Place on a flat and stable surface. ● When cleaning the filter, do not use detergent; rinse off surface dirt with water. Especially in summer, insects may appear, so daily cleaning is recommended. ● For health maintenance, replace the filter every 3 weeks to 1 month, or when visible dirt such as hair or food particles becomes noticeable. ● When replacing the filter, be sure to clean the Pure Crystal main unit and pump to keep them clean.