Milon - you've got mail!

I got a note in my mailbox, saying I had something to pick out at the post office (well, what's left of the post office these days, a booth in the grocery shop). It was the envelope with the twelve ice cream stamps, that I had adressed to myself, about a week ago.

Can you guess what was in it?! I'll give you a hint. I starts with a V and ends with an ISA!