A break from the standard wooden coaster, a bamboo coaster speaks volumes to the natural, sustainable values the brand engraved on it promotes. Bamboo is often mistaken for a tree but is in fact a grass. That gives it a unique grain that is both elegant and natural looking. It is also naturally anti-microbial, containing bamboo kun, an agent that it produces to protect itself from harmful microbes and fungi. These gorgeous square coasters also include foam feet to protect all fine surfaces from scratches. As a natural product, tone variations may occur. Hand washing is recommended.