i know, ill go to the uk one aswell, but.... im started now.
and if the tube blows up it wont be in my face because i use a long handled lighter and anyway it wolud all just come out of the touchhole or the cd at the back...

i covered one hole with a 2 pence peice (slightly larger than thehole in a cd), and the other just with tape. if the pressure gets to great the cd pushes out and the tabe burns through. and yes, i did use a ciggarrete lighter.. and yes i did burn my hand... my middle finger went all yellow/white ...

on the way home from school i noticed a 20ft cardboard tube. it's about 1/3" thick, an can take a tesco value (dont bother asking, im english :P ) anyway, i coevered one end with a CD and copious amounts of tape. i drilled a touch hole, and cut it to 6ft. then put a bolt through to stop the bottle ...