hey, boom, did you really try dry ice?
A few days ago i had a good laugh with a guy who wanted to chill his smoke using LN2
LN2 has temps around -175c. It can litterally freeze you.
Dry ice is also around -80c if am not mistaken, which can still cause damage to your lungs. I'd not suggest any of those.
Last time i put my hose in the freezer (-12c) i got a soarthroat for the next 2 weeks. I'd not suggest any of these.