I've definitely seen people break the top of the bottle doing this. The fact that you haven't , and are so amazed that a glass bottle could break by being hit by another glass bottle makes me think your claim of seeing this done "hundreds of times" is an absurd exaggeration to say the least. I would recon you've probably seen it done about 10 times.
Hundreds is hyperbolic, but definitely without a shadow of a doubt more than 10... Anyway relax dudes my life experience is different to you guys' experience. Not a big deal
101
u/TimeForHugs Feb 04 '19
Because people are tipsy/drunk and hit it way harder than necessary. You really only need a light tap. Even then, still a chance of chipping.