Its just frozen CO2
. It can't 'hurt' your food, but it can ruin it
. Since it will freeze 'burn' anything it touches (resist any urges to lick it
The idea is to use a small amount, probably even less than 1/2 a kilo for a 52L Ice-box, wrapped in newspaper on the bottom, then cover it with a layer of normal ice, then put your meats and watever else you want FROZEN, then another layer of ice with soft-drinks and other stuff that only needs to be cold on top (since hot air rises). The stuff on the bottom should stay frozen, if you use too much, it will freeze the normal ice and whatever is in it into a solid block
(might pay to bring a chisel the 1st time I use it
- If the gases where poisonus, they wouldn't let kids play with it. Its the stuff that you breathe out when you exhale, just 'frozen'. So as mentioned, make sure its not stored in an enclosed space with people, or you'll be asphyxiated. Much the same as you would if you were left in an air tight container/room for a while.
BTW I stopped in at a BOC store today since I saw it, and not all stores have it now
The guy only knew off 2 in Sydney that have it, but luckily one is just down the road from me
. I told him what I was going to do with it and it didn't seem to be anything out of the usual to him.
On a side note, if you have some 'chips' of it, and put it in a coke bottle, add some water and screw the lid on tight, you can make a nice BANG
And if you wanted to be McGiver for a day, you could prolly make a homemade/bodgy fire extinguisher with it