Minimum 2,500, 4" round or square coasters (1.5 millimeters thick) printed in full color on white pulp board. Biodegradable, recyclable, and environmentally safe with soy inks, these compostable pulpboard beverage coasters are durable, warp resistant, and color fast. While absorbent, this hard mat world-class coaster board allows for the highest quality multi-color graphics. With these coasters you get economical full-color printing on both sides in low quantities starting at just 2,500.