-an empty bottle
-rubbing alcohol(any will work)
-a lighter
1. pour around 1 cm of alcohol into the bottle
2. shake it for 2 minutes
3. dump all the alcohol back out
4. drill a hole around 5 mm into your bottle cap
5. light it up and watch it wooosh!
the ignition of the alcohol vapor makes it expand and blow out hot air, the nozzle is used to pressurize the air so it comes out at higher speeds, the ignition spreads downwards until it hits the bottom which is why you should only keep the vapor and not the liquid, after shaking it is also best to let some fresh air in to make a more efficient burn.
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