How to make: -get a 2L bottle and put some aluminium foil balls in it.
-add water to about 1/3 of the bottle.
-pour in some caustic soda, drano or anything with mostly sodium hydroxide in to the bottle.
-quickly put on the lid and throw.
DO NOT shake the bottle because this will speed up the reaction so much that it can explode prematurely in your hand.
