The Butterfly Flower Round Ceramic Coasters is made of absorbent ceramic and cork, the ability to keep your table dry, which prevents the porcelain from scratching the tabletops, and also provides a non-slip surface, so that no items can slip off the table.Suitable for all types of drinking glass such as bourbon, highball, lowball, whisky glasses and cups, cups, bottles, making them excellent tools and accessories for the home bar.