Our Rewritable Magnetic Coasters ensure that the party knows what drink is yours. Using the included dry erase pen, scribble your mark on the top of the coaster. To erase, use a wet cloth and reuse as often as you'd like. The foam underside and recessed magnet prevents the Rewritable Magnetic Coasters from scratching your tables and furniture. Store these coasters on your fridge and they can perform double-duty as grocery list reminders. Comes in a 4-pack.