Petmate's Mason Jar Gravity Pet Waterer holds up to 1 gallon of water and features designs inspired directly from classic mason jars. This self-dispensing waterer for pets comes equipped with a replaceable charcoal filter to remove impurities from your pet's drinking water and provided fresh; clean water. Designed with durability in mind; this gravity waterer keeps your dog or cat hydrated throughout the day. Whether at work; traveling; or otherwise preoccupied; you can rest easy knowing your pet has constant access to filtered water. To fill; simply release the bottle from the quick-lock base and fill the bottle with water. Once the bottle is full; turn it upside down and secure it by twisting it into the base. Made out of durable BPA-free plastic with the safety of your pet in mind. Made in the USA.PRODUCT NOTE: Not Dishwasher safe. To clean; we recommend using a bottle brush and soapy warm water; let air dry.