Can of pop to a bottle of pop?

Question

Later today i saw that a friend of mine had a can of pop in her hand.... but it wasnt the usual top... it was like it was a can for a bottom and a top of a bottle (the spout).

And she showed me that you can take it off... what are they called and where can i get them?

Answer 1

They are called can to bottle toppers here in FL.They keep the can from getting flat. I saw them at the Dollar store.