There are caps, there are bottle openers, and there is the BeerAddicted Cap with Bottle Opener!
With a handy bottle opener at hand, you don't need a table, fork, hammer or other tool to open your beer. Simply remove the cap, place the opening on the crown cap and press up.
This cap is a great accessory for yourself or for your beer-loving friends. It is made of high-quality cotton and is adjustable to fit your head comfortably.