going to track. how to keep nitrous bottle warm

Wrap it in a thermal blanket. When you aren't running at the track you have to be creative to keep it warm I guess since you don't have a heater. DO NOT USE AN OPEN FLAME. That is all I am going to say, I don't want to see a death or injury from something stupid like that. Where is the bottle mounted? In the trunk or inside?
 
Please remember that basic science dictates that the bottle will NOT stay warm just wrapping it in a blanket because the bottle is not producing any heat like you or I would laying under a blanket. So take the advice of putting some type of non flame heat to it.