Abstract: A coaster for a beverage container includes a napkin, a drawstring and a retainer. The napkin may comprise an absorbent material, and may include a bottom side and a top side. The napkin may be configured for draping over a rim of the beverage container such that a portion of the napkin covers the rim when the napkin is draped over the rim. The drawstring may include a first end and a second end, and the first end and the second may extend out from the napkin through at least one opening in the napkin. The retainer may be configured for receiving the first end and the second end of the drawstring, manually tightening the drawstring around an outer surface of the beverage container, and manually loosening the drawstring from around the outer surface of the beverage container.