Drying racks hold tubes and other labware in place while draining and drying. Designed to be used on a benchtop, mounted on a wall, or hung over a sink, drying racks often use pegs or attachments to keep labware inverted while drying. They come in various sizes and materials, including plastics (such as polystyrene or polypropylene), metal, or wood, and may include heating elements or hot air blowers to speed the drying process.