Zippo catalytic hand warmer plug

thingiverse

Zippo officially warns you that once the burner starts, attempting to halt the catalytic reaction is impossible. However, you can manually stop the process by simply pulling out the catalytic burner while it's still burning. It's essential to use a cloth or glove to protect your hand from the intense heat. It's not feasible to store the hand warmer with lighter fluid inside, as the liquid will eventually evaporate completely. To prevent this loss of fuel, I designed a plug that seals the opening and minimizes evaporation. As an added benefit, the plug also secures the burner at the top, preventing it from rattling loose and causing damage.