This one is very lightweight and easy to use.
It tooks only two minute to build and the weight is about 10 gramm.
Step 3: Fold
We can use a tang or just your fingers. One or two millimeters are enough.
Step 4: The burner
You can take a piece off your old jeans or something else but take no syntetic.
Step 6: Cut
First smal holes on the outer circle and then smal holes on an inner circle.
Finally cut two lines in the centre.
Open the four triangle in the middle.