A wood coffee cup has been on my agenda for awhile so decided to do an experiment. This sample cup was turned from silver maple and unfortunately cracked while turning. The cracks were sealed with super glue inside and out. Then the cup was finished with three coats of brushed on lacquer. I was afraid the cracks might come back to haunt me and they did. After only a couple hours holding tap water, the lacquer failed and the wood swelled and burst along the crack lines. If anyone has successfully made coffee cups from wood, some advice is appreciated. Next time I might try some epoxy.