Aluminum can

[6] A label is either printed directly on the side of the can or will be glued to the outside of the curved surface, indicating its contents.

[9] According to estimates from the Aluminum Association, a large amount of aluminium remains unrecycled in the US, where roughly $700 million worth of cans end up in landfills each year.

[12] One issue is that the top of the can is made from a blend of aluminum and magnesium to increase its strength.

Instead of mixing recycled metal with more aluminum (to soften it) or magnesium (to harden it), a new approach uses annealing to produce an alloy that works for both.

[14] Because of the advantages of aluminium packaging (shelf life, durability, food grade factor) over plastics, it is considered an alternative to PET bottles, with the possibility of replacing the majority of them in the next decades.

One aspect that may make someone interested in building a can collection as a hobby is the variety of cans available worldwide promoting such things as films, musical albums and tours, sporting teams and events, countries, ideals and even some non-food or petrol-oriented brands and companies.