This was one of my favorite exhibits at Fort Fetterman. While it may look like nothing more than bits of broken crockery and metal, it's actually a collection of items that visitors found on the grounds and brought to the curator.
Among other things, there are square nails, which are characteristic of the fort's construction, and a bottle with a round bottom. Why round? The stoppers were corks, and they needed to be kept moist. The round bottom meant that the bottles could not be stood on end, which could have resulted in dry corks.