There are surprisingly many different kinds of bottle openers out there, but the two most popular by far are corkscrews and bar blades or crown cork removers. Corkscrews are used for opening bottles with corks, such as bottles of wine or champagne. To use them, you just screw them into the cork, and then push down on the sides and pull the cork out.

Bar blades and crown cork removers, on the other hand, cannot open corked bottles. They are basically just the end section from a corkscrew, used to quickly open capped bottles. There is nothing they can do that a corkscrew cant, but they are much smaller, easier to carry and cheaper to manufacture. These kinds of bottle opener are often stuck to tables or walls, making it easy to just grab a bottle and open it. You can even get them on belts!

For all bottle openers are so cheap and disposable, however, its still surprisingly easy to find yourself without one. In this situation, the best thing to do is to simply use a knife (make sure to use the side that isnt sharp) or some other pointy object, such as a screwdriver. In the original 1891 bottle cap patent, this is actually how the inventor of the crown cap that is now used everywhere, William Painter, says that his caps should be removed he didnt invent the bottle opener until two years later. Note that it is a very bad idea to try to get a bottle cap off with your teeth, unless you werent fond of them anyway.

Today, however, bottle caps are being gradually replaced with screw caps, which means that the bottle opener is in terminal decline. It seems likely that in the future bottle openers will only be required for wine and beer, with other drinks coming with the much easier to open screw caps.