I bought them plain at Michael's and have enjoyed painting and embellishing them. I've used paint, scrapbook paper, ribbon, and vinyl to embellish them and lined the insides with felt.
I think they would be perfect for carrying jewelry when you travel or to set on a night stand with your jewelry in it while you sleep. They'd even be cute packaging for a gift card.
I've put a couple of them in my Etsy store.