Is there a material that is combustible yet inconsumemable or a material that when burned lasts long?

Question

Is there a material that is combustible yet inconsumemable or a material that when burned lasts long?

the flame in the material, that is combustible yet inconsumable, dies out only when poured by water.

or a material that lasts long when burned

please dont answer candle or oil lamp.

preferably something different.

if there isn't such, what are the ways to make this kind of material or is this idea impossible?

please answer ASAP

Answer 1

Your idea is impossible, burning anything is a chemical reaction and you will always run out of reactants.