From Longman Dictionary of Contemporary Englishbottle openerˈbottle ˌopener noun [countable] 
DFUa small tool used for removing the metal lids from bottles
DFUa small tool used for removing the metal lids from bottlesExamples from the Corpus
bottle opener• Make a check list of essential items such as a corkscrew, bottle opener and a sharp knife for cutting bread etc.• Each of us takes a turn with the bottle opener. 