[samste]

I use a Metal Toolbox lined inside for storing my lipos so they cannot be pierced or damaged, thats what normally causes them to catch fire or in the charge process for reason or another, Yes Andre is right you do not want it air tight hence the space on side or hole or lid wedged open slightly,.
Another concern is the toxic fumes if they ignite.

We have a Thread re this Topic -

http://forum.rcflyingclub.com/showthread.php?tid=791&pid=14178#pid14178