2dim said:
Dry ice MUST be handled with gloves, to avoid 'burns'. Carbon dioxide gas is heavier than air, so wrap it thickly to preserve and place in TOP of freezer or cooler. Fun to play with, too...makes 'smoke' in water. Flush small pieces down the toilet and freak your kids...use in pumpkins for Halloween. Great effect with the right lighting. No danger from inhalation, except suffocation which would take an awful lot in a completely enclosed space...please don't stick your head in it, Raggie!
OT, but hey...
When I worked at a grocery store in high school, we'd all jockey and try to shuffle our work duties to be back by the freezer whenever a pallet of ice cream was delivered so we could screw around with the big slabs of dry ice that were kept in the center of the load. There was the usual nonsense, "smoking toilets", and exploding soda bottles from the damaged goods pile thrown into the back dumpsters, filled with warm water, crushed dry ice, and screwed shut, etc.
My invention was the best IMO.
I made insulated "shoes" out of layered cardboard and plastic bags, put them in the freezer, laid a big chunk of dry ice against the "cold" side for an hour or so in preparation, so the ice would stop sublimating against the "shoes". And once the contraption was chilled enough that the dry ice could stick to the "shoes", you could jump on top of the block and skate around the floor of the store on your frictionless skateboard! As the bottom of the exposed dry ice sublimated against the warm floor, you rode along on a cushion of carbon dioxide.
That is, until some of the 3rd shift stockers all decided to push me in a running start to see how far I could go in the longest asile of the store, and I glided right past the general manager.
Fortunately, he thought it was just cool enough to not fire me on the spot.