Natural Bamboo Round Drink Coaster - Set of 6 Leaving glasses or cups on top of unprotected furniture can often lead to unsightly and unpleasant water rings that can ruin wood and take off wood's finish. Luckily, there's a wonderful fix: Drink coasters. By placing something between your drinks and what they're on top of, you can protect your furniture from drink dangers. Constructed entirely from natural and durable bamboo, these coasters have a contemporary design that is sure to please. In order to work with a wide variety of glasses, cups, cans, and bottles, these coasters are made to measure 3.5 x 3.5 x 0.125 inches. Backed by our 100% Satisfaction Guarantee (details below in description)