1pc induction foil seal
It has a function the same as the two piece induction foil seal, but nothing is left inside of cap after opened. There are various combinations of innerseal material like two piece induction foil seal, some are foam backed and some paper backed. It also can be custom printed with a customer's logo or trademark, or can contain some type of message, such as, "sealed for freshness." It can be welded and have to be destroyed, to be removed or it may be peelable for easy removal.