By the way,,..... if you google Techni Ice it gives you the Austrailian site, but there is a US distributor... but their sheets are about $4-$6 each sheet!!! The website gives lots of info. Says you can heat it too, and use as a heat pack for muscles., etc. Reusuable... the sheets when activated are 9"x13" or you cut them .
My friend said " oh, I got that at Walmart" well, no hers is the plastic ice cubes similar to the "blue ice" but don't stay frozen any better than a real ice cube.
My main reason for this is the way it will STAY cold and NO MESSY WATER or possible leaks etc
I pm'd Rayvillian about the thing he bought but they are out doing the retirement road trippin thang ....