i purchased a bike pump co2 cracker which has a button which you can controll the release of the gas, so what i do is i attach 1 meter of 10-12mm clear tube to the end of it, and by the time it reaches the end of the tube, the gas has cooled down nicely.mused said:any body know of balloon brands or types that dont tear break so easy when using a metal cracker? chepo balloons are no good imo