hmm, u must be talking abuot a hash cone.. what u do is take a block of hash and make 2 stacks of coins.. take a pin and put it thrue the hash block and then light it on fire , blow it out and catch the smoke with the bottle and quickly put the bottle ontop so that it catches the smoke.. .. hmm.. its hard to explain.. i have a movie of it ill post it here

http://www.lasparkashow.com/newvids/dopetip1.mpg

here it is

My sig won't show =/