Comments: Talk about frigid.

It could be supercooled, but that's not really likely... it wouldn't freeze as he's shaking the bottle.

I found this: Put 1/3 cup warm water into a paper cup. Use a stirring stick and add 1/4 teaspoon guar gum into the water. Stir until mixed and the guar gum is dissolved. Optional: add 2-5 drops of food color. Mix thoroughly. While stirring, add about 2 tablespoons 4% borax solution to the guar gum mixture.

That was found here:

Posted by That 1 Guy at June 24, 2006 10:54 AM

that makes goo yuck, not real ice. Hmmm. There are any number of endothermic reactions that can be done by adding the chemicals to a bottle of water and shaking.....

I'll bet it's the stuff they put in those "instant cold" ice packs.

Posted by caltechgirl at June 24, 2006 11:09 AM