Don't worry if you get stuck with a couple of bottles of beer and no opener

http://www.videojug.com/film/how-to-open-b...a-bottle-opener

All of our Canadian beers come with twist caps EH!
http://en.wikipedia.org/wiki/Canadian_beer

No worried there Kenny if the top won't come off.

Just fit the lid bit in a door frame (the hinge side) and close the door until it grips the lid tight, then twist.

Works everytime, but leaves tell-tale marks on the frame

Sort of reminds me of how we've always opened tight jars which are way too tight:
We give the lids a couple of light smacks on the kitchen floor to help break the seal, and then they open up very easily - all without some stupid gadget to open them.