Where i live we have 10 cent deposits for retuning all recycled bottles and cans

You absolutely can open the top of one more.

I can use my tooth and take the top right off and make cups out of cans. Do it all the time camping.

They work fine except for the sharp edge because it’s just like being opened with a can opener.

You can crush a disposable paper cup easier then a soda can with the top taken off