Square Black Coasters 500 ctPlace an emphasis on cocktails and beverages when they are displayed on top of sleek and contemporary Square Black Coasters. The 4 inch coasters add style to drink service in restaurants, pubs, hotels, and at catered events. Each heavy paperboard coaster measures features a stylish jet black surface on both sides for a classy and sophisticated look at the table or bar. Round Black Coasters are sold 500 per case.