A coaster for supporting beverage cans that is also operative to open both tab topped beverage cans and twist-off cap bottles. The coaster is a square body with parallel top and bottom surfaces and relatively short sides that are normal to both the top and bottom surfaces. A circular depression, whose...http://www.google.es/patents/US4829618?utm_source=gb-gplus-sharePatente US4829618 - Coaster/opener for beverage containers
