Saw the pin earlier about cutting glass, but I'm sold using old bottles. If I can only find the pin again. make glass sets from old bottles, using a glass cutting technique with yarn, nail polish remover and a flame!
If you were to use drift wood this would be awesome for a beach reception style thing. Very natural, but striking. Drill holes in wood, place tea lights. Beautiful outdoor table center piece for the picnic table---AROUND THE GARDEN POOL