This Techni-ice is awesome. lasts a long long time keeping things cold.
comes as a flat as paper sheet, that you then hydrate to fill/plump up.
you can also cut the quilted sheets to what-ever size you want.
conforms for wrist / knee injuries too under an ace wrap.
Super sweet stuff, not very well known made in Australia.
google different ebay deals and amazon or other sources. this is cool sheet!
Amazon.com: Techni Ice HDR 4 Ply Reusable Ice & Heat Packs 20 Sheet Special