We needed a place to store the dried snail shells, driftwood that comes in cool shapes, the drawings of snakes and the drawings of the occasional pet dead fish that shows up in my freezer. (I found him, by the way.) And, a lot of rocks. Some of these rocks are purported to be Geodes, and all kinds of rare treasures that are worth upwards of a million dollars.
So, we ate our pickles, washed the jar out, and painted a canning jar lid with chalkboard paint, and labeled the jar. Our treasure chest is really just an old pickle jar.