Here is another Insta Heat unit I made recently. It is made from a banksia pod which required me to use a glass insert held in place with a silicone sleeve. The bottom cap and roasting tube are made from blood wood. Finally decided to try for myself an idea that I gave to @Bravesst for the Lil' Bud about lining the coil cavity with ss foil. It works quite well. More of the watts are going to heat the air rather than heat the wood body. I will be making all new Insta Heats with a ss foil liner in the coil cavity. It is a great advancement in the design.