If coffee is your thing (yes, please) then you can show your caffeine love by wearing it on your hand. Which is better than wearing it on your sleeve, as that would just indicate shaky hands and a coffee mess.
From Etsy seller Pink Diamond Design this ring uses a tiny porcelain teacup and saucer and a little spoon, set on a ring band. Voila! Your java jones will never have to go unsatisfied, with no future fear of barista name misspellings. This sells for USD$20.