Start a fire in any conditions - my tests have shown more than 10 minutes of burn time, even in the rain!
The FireCube uses just dryer lint and candle wax to make a long-lasting and safe firestarter.
The cube is designed with slits to allow for airflow to keep the flame burning, and the wax will release from the centre circle to maintain a steady and resilient flame.
I also designed a water-resistant screw-top container for 4 FireCubes, that can fit matches, small lighters and matchbooks within.
Note: ONLY PLA CAN BE USED, do not use PETG or ABS (or other filament types). PLA has been shown to burn with minimal air quality impacts, and leave no residue.
Print:
My tests worked very well with 0.2mm layer height and 15% infill, though other layer heights and infill would likely work fine.
Disclaimer that fires are dangerous and should only be done outdoors in a safe manner and a controlled environment, with water nearby to put it out.
Inhaling any type of fire smoke is not good for you, but burning PLA has been shown to be relatively safe in terms of fumes and toxicity: See the ‘end of life’ section of this wikipedia page on PLA: https://en.wikipedia.org/wiki/Polylactic_acid#End_of_life
In any case, I recommend allowing the entire cube to burn completely before cooking anything over the fire.
The author marked this model as their own original creation.