On Thu, 08 Feb 2007 22:17:04 +0000, Ian Malcolm
wrote:

Dry Ice is solid CO2 and that gas is heavier than air and *will*
suffocate you given the chance. You'd need to keep your coolbox in a
locker that had an overboard vent just like a gas locker.

Nonsense.

The real problem with dry ice is that is difficult to obtain many
places.