You are looking for a silver bison tube.
We noticed that one of our good geocaching friends was long overdue for their commemorative silver ammo can, having reached the 1000 finds milestone some time ago. But they declined our offer of a silver ammo can, so instead we're putting up ten silver bison tubes.
This cache commemorates the 300th find.
Unatvat ba gur onpx bs gur Qrnq Raq fvta, ybbx uvtu.