Hmm... バコン could be more of a 'whud' than a sharp 'bang'... but yeah, the tab should rupture and the can will rupture - if there are dents or it's a steel one with a stronger tab, then the walls can break open also. Glass will shatter if the lid can't deform enough for the increased pressure (which is why you never freeze glass bottles that are totally full without taking the lid off)
It has to be a totally full bottle with a tight cap, beer bottles don't come full to the brim, usually.
So I guess someone agitated the bottle when she put that bottle of beer in the freezer. If you're careful, you can get some nice super-cooled beer that freezes solid the moment you give it a light tap.
Well, that's if the beer shaking inside the freezer doesn't pop the bottle's neck off first.
They're cans of beer, as shown in Yura's hand in the first panel. Don't even really get that many bottles of beer in convenience stores here, it's almost all cans.
Any kind of carbonated canned drink will eventually pop and burst when in the freezer. The sealed pressure doesn't react well with it.
Yes!
So I went and put it in the freezer to get it nice and cold!
Fridge 冷蔵庫 /reizouko/, freezer 冷凍庫 /reitouko/Seems like Yuubari bought herself a new fridge, right?Wow, thanks!Yuubari's out on an expedition at the moment, so I'll put them in for her, okay?That nightSo, I heard that Yura bought some beer for me?wait... what...You're lying, right...?There was some kind of "bang!" noise along they way, though...
I'm sure it'll be ice-cold now...!These aren't cold or anything, but I'll give them to her so she can cool them down.Stocking up!