We've been using the same Tupperware brand 'side-cut' can opener for at least 20 years now and it still works good almost all of the time. Once in a while an odd can may need to be run through a second or third time but so far it has always cut the top off and never left with any sharp edge on lid or can. The handle and twist crank are some kind of thick, tough hard plastic but nothing has ever broke or even cracked on it.
