Robby if it wasn't for people "littering" years ago, us bottle collectors would all be out of business now , lol. I love finding old Cokes laying in the woods and on roadsides. They are starting to be found less anymore.
It doesn't *always* work, but does increase the chances it will many times. I dug a rare local milk with a WW2 back, but even after 30 days it still destructed. I think the minerals in the dirt it's found in has a lot to do with it.
RobbyBobby, I posted your pic of that item on my metal detecting forum and after 123 looks nobody has identified it either, except the single response said maybe part of a trap. I'll chime in if someone ID's it.