Up until recently I have been using my teeth to open bottles, as I assume is what most people do. Let me tell you my gums and teeth did not like that one bit. In one of my numerous visits to the emergency room with yet another case of split lips I was informed of this wonderful new invention which can be used to open bottles without having to use one's teeth at all. You just place the device in the appropriate manner on top of the bottle, you pull in the appropriate direction and the lid comes off! Absolutely amazing. And wouldn't you know it, this wonderful new device is already available on amazon.
My only complaint is that it didn't come with an instructions manual and after many frustrated attempts I had to seek the help of a technically sophisticated neighbour to learn how to use it. But once I got the hang of it I wouldn't go back to the old method for all the money in the world. I bet when I go for my next check up, my dentist won't believe the wonderful state my gums and teeth are in now.
So go ahead, buy this and your mouth will be eternally grateful.
P.S. Do not use this with bottles which have a twisty lid, it won't work, use your fingers instead. They should probably add a warning to that effect.