My pal Shauna from FairGoods came up with this clever DIY coaster project: some bold type on the front for visual interest, and your favorite cocktail recipes on the back for reference.
FairGoods sells the whole project as a kit for a very reasonable $9.00. If you've got some design skills or want to try your own recipes, this technique will work with any toner-based print from a laser printer or copy machine. Just be sure to print your image backwards, and use a blending pen to release the ink onto the cork.
See the full how-to at Fairgoods: DIY Typographic Drink Coasters