Martha Stewart Living, December 2002
Print and cut out the poinsettia template (you'll need two different sizes, so reproduce at 100 and 120 percent). Place cutouts over a sheet of foil, and trace with a pencil. Using sharp scissors, cut out the foil shapes. For each bobeche, make one foil cutout in each size -- either in matching colors or in complementary tones. Apply a square of tape to the center back of each cutout. With a utility knife, cut a small X at the center of each square of tape and through the foil as well.
Make sure lights are unplugged before proceeding. Poke a lightbulb through X slits in a pair of cutouts, starting from the bottom and pushing it through one poinsettia at a time. Adjust paired cutouts so all leaves are visible. Curl points upward slightly. Repeat these steps for the rest of the lightbulbs. String lights onto the tree; adjust bobeches before you plug in lights.
Heavy aluminum foil (Rolls of heavy aluminum foil in various colors are available at crafts stores.)
Electrical or gaffer's tape
String of lights
Back when the lights on Christmas trees were candle flames, bobeches formed protective collars to catch dripping wax. After electric bulbs replaced wicks and flames, the embellishments took on a purely ornamental role as pretty reflectors of light -- until they passed out of fashion in the seventies. You can re-create this old-fashioned sparkle by slipping homemade "poinsettia" bobeches over strings of lights.