[lathiat]

You can definitely cause problems by spilling an entire dewer into a smaller room.

Had to calculate this for the safety part of a LAN party event application. Fortunately we had a very big room.

[olliej]

Dewer! thanks, I knew there was an actual name for those heavy duty thermoses but it completely escaped me :D

[BenjiWiebe]

Dewar, actually. Originally Dewar flask, after Sir James Dewar.