I have spent a few days this week with family that's been in town, and one of my favorite things has been snorkeling in the lake. I have found a bunch of old cans and some odd bits of metal, plastic, and even paper. Most of the interesting stuff is deep though; you don't find much until you start diving about 15 feet down. Fins help a great deal with that.
Earlier this week I found a Quirst can:
(this is not the can I found, just an image of one in similar condition)
I've never even heard of Quirst. It must have been around when I was a child, but I don't remember seeing it, drinking it, or watching its commercials.