clipped from: www.ehow.com 
This is how to make a REAL Molotov Cocktail, but take heed, this is illegal in most regions.
Take the cap from the bottle, cut a hole in it as large as you can while still letting it screw back on to the bottle. Cutting the hole while having it screwed onto the cap is your best
bet.
Take a small rag about 2x2 inches and soak it in the kerosene.
Pour the regular unleaded gas into the beer bottle as far as the neck, and then stop.
Screw the cap back on and ball up the rag that you just soaked in the kerosene and stuff it into the cap, make sure it doesn't fall into the bottle, and make sure the rag has a tight
fit inside the cap.
Light the rag and throw the cocktail like a football, when the bottle busts, the ignited rag should touch the gas, leaving anything with in it's blast radius burning like ****.