Groupon offers the Intoxicase Bottle-Opener Case for iPhone 4 / 4S
with free shipping
. That's the lowest total price we could find for any such case by $2. (It also has, in our opinion, the best name we've seen for any
iPhone case. But we just really dig portmanteaux.) This case features a tight-grip 304-type 0.2" stainless-steel bottle opener (which claims to distribute pressure easily) plus a chambered front-edge. Deal ends July 1.
If you're interested to learn just how many beers you can handle, download the corresponding Intoxicase app for free from the iTunes App Store.