Just put the bottle into the heel of your shoe, hold it so the bottom is parallel to the wall, and give it a few firm taps against a hard wall. Here’s a demo video; it’s in French but the visuals makes sense.
Do you know the lengths I’ve gone to to find a corkscrew? Trying to befriend snotty neighbours, wandering into Greek restaurants at 1AM, poking around with knives… and all this time I was standing on the answer. I can’t wait to try this. If I show up with a giant purple splotch on my pants you’ll know it was a fail.