Resealability is a common function for caps and closures on plastic bottles and other types of beverage containers, but for metal cans, resealability has remained problematic, according to Andreas Kleiner, founder and CEO of can2close GmbH.
“Since the 1960s many inventors have attempted to solve the riddle of the resealable can, but even the most promising innovations were too technically complex or were not economically viable to integrate into internationally standardized filling processes,” Kleiner says. (The last significant change to the soda can was the stay-on tab, launched in 1974 as a replacement for the ring-pull and a means of reducing litter and the risk of injury.)