Making a kangling for chöd

"A kangling is a trumpet made from a human thigh-bone. You play a kangling in tantric Buddhist rituals, particularly chöd.

The function of chöd is to cut your emotional attachment to your body. Putting a dead person's leg bone to your mouth—to blow the kangling while practicing—is an intimate reminder of your own mortality.

Chöd is also a celebration of generosity and of your connections to people and other creatures in the web of life and death. Recognizing your place in the food chain is a part of that."

http://buddhism-for-vampires.com/kangling-chod