What I designed is a square coaster, which is different from those seen on the market. Coasters are multi-functional drink accessories, usually made of non-slip material, which can prevent the cup from tipping and absorbing water droplets. The design is simple and lightweight, suitable for various cup shapes, and protects the tabletop from getting wet. In addition to practical functions, they can also have rich patterns and colors, adding fun and beauty to daily life.