what is the hole in a bottle opener for
Bottle opener The speed opener is a flat blade of steel approximately 4 cm wide and 16 cm long with a thumb hole at one end and a letterbox cut at the other to remove the crown seals from a bottle. They go under the names 'Speed Opener', 'Popper', 'Mamba', ‘Bar Key’, and most popularly 'Bar Blade'. The thumb hole may be used to pull bottles out of ice, by placing the hole over the neck of the bottle, then lifting it. The speed opener is widely used by professional bartenders in Canada, the United States, and the UK. Carried in the pocket or against the body or on a zip string, it is both convenient and fast for the modern bartender. It is advantageous in that it is easy to open several bottles in rapid succession, and with more flair than other types of bottle opener. Consequently, 'bar blading' is often part of bar flair routines.