To create the hole to hold the incense follow these simple steps:
1. Cut a strip of 1/8" thick fiber paper to 1/4" x 1/2." Cut a strip of glass to 1/4" x 2-1/4".
2. Cut a 2-1/4" x 12" piece of glass for the body of the incense burner. Position the fiber paper and glass strip on top of the base glass, about 1" from the end. Full fuse.
3. Leave the fiber paper in place. Position the full fused piece of glass on the mold. Slump.
4. To remove the fiber paper use a piece of wire or a pipe cleaner.
A second option is to use a 1/8" drill bit to drill a hole in the glass after the piece is slumped.

Finished project shown created with Vienna Spirit glass #X43176.