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 A guard kept the sickle from penetrating too far into the can. The opener consisted of several parts which could be replaced if worn out, especially the sickle. This opener was adopted by the United States Army during the American Civil War (1861–1865); however, its unprotected knife-like sickle was too dangerous for domestic use. A home-use opener named the "Bull's head opener" was designed in 1865 and was supplied with cans of pickled beef named "Bully beef". The opener was made of cast iron and had a very similar construction to the Yeates opener, but featured a more artistic shape