At Red Cup Living, our cups are made from a strong, durable, reusable, and eco-conscious ABS plastic material, so you can feel good using these red cups. Our tire valve cap has that cool look of the red cup from your college days but is made from some serious material that aligns with your current earth-friendly adult values. Our tire valves are the perfect way to add a touch of personality while protecting your ride. They are designed to keep away and prevent the elements such as dirt, sand, water, and debris from entering your tire and damaging it on the inside. This also helps keep the air in to prevent getting a flat. Our tire caps are made with hard plastic on the outside and have a brass core on the inside, to ensure a tight seal. These caps suit the standard tire valve most wheeled vehicles have, so you can use them on most bikes, trucks, cars, RVs, motorcycles, ATVs, golf carts, trailers, stroller, nearly anything with wheels. They make a great novelty birthday gift or graduation present for friends and loved ones who have an appreciation for the iconic red cup.