I do hope you enjoy and stay safe! as this can be quite dangerous!
Step 1: Gather materials
1 Glass bottle (the thinner the glass bottles wall the better)
Acetone (Most commonly found in nail polish remover
Some form of abrasive paper (I used emery board)
Sink filled with cold water (the colder the better. I used ice which helped)
Step 2: Prepare the bottle
Gather your string and wrap a portion of it around the circumference of the bottle. Tie the string together and cut off the excess.
Take the string off the bottle and submerge it into a volume of nail polish remover.
Put the string back around the the bottle and prepare to ignite! So keep the bottle of nail polish away and be prepared for accidental fires.