I found this container while working on the SAC geoart several years ago. The owner had replaced one that had been missing, and I found the missing container on the ground. I had told the owner that I would put it to good use, but it got misplaced in my truck and I just found it today.
The hint is the same one I got while hunting a cache in SE DM recently, if you don't find it all that helpful, blame Stephenjha 