From Longman Dictionary of Contemporary Englishbring a bottlebring a bottleBritish English, bring your own bottle American EnglishDFDDL used when you invite someone to an informal party, to tell them that they should bring their own bottle of alcoholic drink → bottle
Examples from the Corpus
bring a bottle• Sergio had brought a bottle of wine.• He brings a bottle of bubbly and a basketball.• Now that we are a little more prosperous, the habit of bringing a bottle seems to have dropped off.• The Treasury, however, conspicuously failed to bring a bottle to this party.• The first woman to reply told me to bring a bottle of wine.• I've brought a bottle with me and put it in the fridge. 