This video by Denver Integrative Massage School shows how to use Thai herbal compresses to make a neck pillow. These can be used during a session with someone else or as part of self-massage. Carefully, remove the compresses from the rice cooker, and use two towels to wrap around the compresses to make a heated pillow for your neck.
Denver Integrative Massage School offers continuing education classes on Thai herbal compresses and it is part of their 600 hour massage therapy training program.