While looking around amongst sites for clothes, photography, etc. I ran into these little guys and thought about how cute of an idea it is. Then I suddenly had a vision of the future -- my old, lunatic chemistry teacher from high school (who had a good heart, all in all) running into me after purchasing one of these and smacking me across the head and reminding me that I was fucking horrible in chemistry. But then we'd go get coffee and exchange some horrific life stories afterwards... just like old times.
So I decided against getting one of those rings.