Radiation Symbol Coasters are crafted from durable PLA plastic, designed specifically for cold drinks. Their distinctive radiation symbol adds a unique, scientific aesthetic to your table while protecting surfaces from moisture. Available in multiple sizes, these coasters provide versatile options to suit various glassware. Please note, they are not intended for use with hot beverages to maintain their integrity. Ideal for enthusiasts seeking a functional and thematic accessory.  The coaster consists of 2 pieces, the outer tray and the yellow insert.