Introducing Cardboard Coaster–Super Absorbent & Disposable for Drinks. Keep surfaces dry and branding visible with our Cardboard Coasters, made from 1600gsm water-absorbent cardboard material. Ideal for pubs, cafés, events, or promotional giveaways, these lightweight coasters effectively absorb condensation from cold beverages and offer a smooth surface for vivid custom printing. A perfect solution for disposable use without sacrificing quality or style.