Hmmm... IIRC potassium permanganate and glycerin can cause spontaneous combustion. It's been a few decades since I've done it, but I seem to remember putting the two in a piece of paper, twisting really tight and it would combust from the pressure.
From wiki...
Safety
Solid KMnO4 is a strong oxidizer and thus should be kept separated from oxidizable substances. Reaction with concentrated sulfuric acid produces the highly explosive manganese(VII) oxide (Mn2O7). When solid KMnO4 is mixed with pure glycerol or other simple alcohols it will result in a violent combustion reaction.
3 C3H5(OH)3 + 14 KMnO4 → 14 MnO2 + 14 KOH + 9 CO2 + 5 H2O
I just realized that was the intent here, spontaneous combustion from mixing the isolated materials in the straw.
Personally, I'll pass.