These are the traditional corks used to bottle finely crafted Belgian and other specialty beers in Belgian bottles. Once corked, these should be covered by a wire hood in order to keep pressure from building up and popping the cork out. When used correctly, these corks can keep carbonation in beer for a long time. They are great for beers that are to be aged and cellared. Consider corking in Belgian bottles instead of traditional beer bottles the next time you're got an extra special beer or beverage to bottle!