Push-through

Twas hard to believe a whale that big could get herself into the pond. Certainly, there was no water for her in the pushthrough, and even the south gut never had no more'n two fathom and a half since ever I see it. But there she was, and looking twice as big as life.

Greener's ‘push through’ invention works well with very small bores.

The push-through tab on canned drink was first sold in 1973.