Sound Label Composite Board Coaster gives a simple style. The coaster is made of composite board with reusable, water proof, environmentally friendly and heat proof in different shapes. Features four small non-slip black pads on the bottom, making it more non-slip. In the middle , aluminum strip is used to weave mesh process, which is more creative. Perfect using under glass, cup, bottle. Obvious imprint area is perfect to show your brand and logo.