The cork coasters are made of cork, which is very strong, beautiful and thick enough. The perfect material for absorbent and flexible mats on the bottom of glassware. Works great on iced drinks and chilled water, absorbs water or heats up quickly instantly. Bulk cork coasters: There are 18 brown cork coasters, simple and classic, enough quantity to use or place in your , family gathering, , barbecue or other events, and their is blank so you can use paint and a marker pen (not included) to draw patterns on them to make them more attractive and show your own personality Good leak-proof performance: The cork round coasters are designed with rising edges, so the condensation of cold drinks can be collected inside without spilling, and they ' stick to the bottom of the cup, which can keep your table away from grease , water, Beverages, spills, scratches and other stains, bring you a good using experience These cork coasters are 4 inches in diameter and are suitable for all glasses, mugs