The Medium SkidStop Slow Feed Bowl is a heavy duty plastic bowl designed to slow rapid eating, promote regular digestion, and prevent bloating and discomfort for medium sized pets. The Skid Stop bowls were designed with a rubbery base to prevent the bowl from sliding or moving around on the floor while the pet is eating. The rubber bottom creates a firm grip on slippery surfaces to prevent the bowl from moving or tipping, this also helps to prevents spills. Skid Stop bowls are dishwasher safe and are rust and bacteria resistant.