Pulpboard coaster up to 4 colors/2 sides (4/4) 80pt. 4" round or square. Quantity 2500. Your advertising message and logo can be read repeatedly on these reusable coasters. While absorbent, the hard mat board allows for the highest quality multi-color graphics. Biodegradable, recyclable, and environmentally safe with soy inks, these compostable pulp board beverage coasters are durable, warp resistant.