[amyames]

the pull tab on the right has a divot in it where it makes contact with the can, and it concentrates more pressure at the point of contact to pop the seal.

That’s an attempt to mitigate cans where you’d pull the tab and the tab would just break off without opening the can. So the person who answered it’s usually because of the seal is right.

other half’s dad [retired from] Campbell in Ohio and isn’t an internet let alone a Reddit person, you’d never guess how much trivia there is about their #2 can. I’d have commented but a brand new account will probably be buried as spam … and the second answer is correct anyway.

[Ferret7446]

That sounds... at least partially wrong?

Pull tabs do not break the seal by pressing in to the can. They break the seal by pulling the lid up away from the can, where the "swivel" point is. The tab acts as a class two lever, where the "tip" of the tab is the fulcrum.

https://en.wikipedia.org/wiki/Lever#Types_of_levers

[juancb]

I hope to someday be too good for Reddit. For now I tend to use it or at least click on links to it like I do for Twitter.