Need Help Identifying Cache

Yes, I have no clue what this is really used for, but the Need Help Identifying Cache * is made of metal, its about 50% bigger than a standard magnetic nano cache, I'd love to know what the original use for this is, though its possible its actually a cache container period! I can't imagine what else you would put in it. I have probably DNF many of these kinds of caches hanging around in bushes and trees. But I did find this one, I imagine in the summer the greens all grown it would make this a lot harder.

Help Identify Me!!!

*- Well now don't I feel stupid, I was looking online at container types and found this very one, a nano Bison officially. So I missed it.