Birch disks, stained in a variety of hues and then treated with a coat of matte polyurethane, can be used as decorative and functional trivets, coasters for drinks, and mini hors d'oeuvre trays. These trivets and coasters can handle hot, but not scalding, dishes. They also make pretty serving pieces. Because the wood stain isn't food-safe, slip parchment paper beneath any food to avoid placing it directly on the wood.