Bottle opener capacity. A specific style of bottle opener is known as a churchkey. Invented at the same time as the crown cork, it is the original bottle opener. But as well as being portable it also comes as a fixed device to be attached to vertical surfaces, often with a tray to catch the bottle tops. It does not open wine bottles. It is class 2 fulcrum type. A simple opener is a piece of metal with a rectangular or rounded opening in one end and a solid handle large enough to be gripped between the thumb and forefingers on the
Bottle opener Definition graphics with epoxy dome on chrome plated versions of the bottle opener. Novelty bottle openers became a popular promotional product for many beer brands with the advent of the surfboard bottle opener by Jim Wysopal from Openers Plus in California 1990. Under most use, a bottle opener functions as a second-class lever: the fulcrum is the far end of the bottle opener, placed on the top of the crown, with the output at the near end of the bottle opener, on the crown edge, "between" the fulcrum and the hand: in these cases, one pushes "up" on the lever.