Aluminum Pull-Tab Cans
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Can tabs are the tabs on the top of cans that you pull back to open the can
tHEY HAVE GREEN ONES AT XMAS
Yes
The empty cans are delivered to the drinks factory. The factory fills the cans with whatever beverage they're supplying. The factory puts the can lids on (complete with ring-pull) and a machine seals the edges.
the pull-ring tab on pop-cans was invented by Frase but was later sold to Alcoa in 1963.
The pull tab or ring pull on top of cans is typically referred to as a pop tab, can tab, or ring pull. These mechanisms are used to open the can easily by pulling it back to reveal the opening.
Carbonated beverage cans are made with a stronger aluminum alloy to withstand the pressure from the carbonation inside the can. Pull tabs are made with a different aluminum alloy that is easier to pull and consume the beverage.
On older cans, they were made of an aluminum pull ring attached to a steel teardrop shaped metal piece. On newer cans, both segments are made of aluminum. The newer versions are made to allow the pull tab (or lever) to remain attached to the can and the pull tab portion to sink into the opening of the can but not separate from the can.
Mikola Kondakow, of Ontario, Canada, invented the pull tab version for cans in 1956 The inventor of the non pull tab can is unknown
aluminum pull tab