I couldn't resist placing one here.
It is a small pill bottle covered in brown duct tape. It contains a dollar in change for FTF and a couple of very small pretties.
Please replace it carefully in the spot where you found it.
From the trading Post, go about a mile toward Tin Cup. Before the bridge, turn left on road 587. Be considerate when driving through the RV park and past the cabins. Stay on 587 until you reach the cache. It should be easy to find.
This FS road is not maintained. The cache might be accessible by car, but a high clearance vehicle would probably be preferable. Or alternatively, drive as far as you are comfortable, then walk the last little way. It shouldn't be a long hike.