Snow coasters are a type of sled that is designed to be used on snow and ice. They are typically made of plastic or metal and have runners on the bottom that allow them to glide over the surface. The term 'snow coasters' is often used to refer to these sleds, which are also known as toboggans or bobsleds. Snow coasters are popular among children and adults alike for their ability to provide a thrilling ride down a snowy hill.