You wouldn't want to drink stale standing water and neither should your pet! The Pioneer Pet Plastic Raindrop Design Drinking Fountain has a special design that circulates your pet's water source through the filter keep it fresh all day! Holds 60 ounces so you won't have to refill as much throughout the day. Your precious pet will love drinking the clean and pure water from this fun pet fountain. The moving water tends to attract pets to the bowl. Easy to set up and clean up, the Pioneer Pet Plastic Raindrop Design Drinking Fountain is dishwasher safe.