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
Can opener end, it was devised by D. F. Sampson, for the American Can Company, who depicted operating instructions on the cans. The church key opener is still being produced, sometimes as part of another opener. For example, a "butterfly" opener is often a combination of the church key and a serrated-wheel opener. There is sparse, and often contradictory, documentation on the origin of the term "church key". The phrase is likely an ironic euphemism, as the opener was obviously not designed to access churches. One explanation is that in Medieval Europe, most brewers were monks. Lager cellars in the monasteries were