Interesting Ebay Deal

[d'am]

Originally Posted by JaKaacH

In my cooler I used beads that are made of the same material that is in the water pillows. In my cooler I put some of the beads in a small zip lock freezer bag, using the boxes to hold the bag upright. This bag of beads is probably equivalent in size to about 4 or 5 pillows. My cooler must not seal as tight as NCRadioman's. But when I check the cooler and the RH is to high zip the bag closed until it reaches the low 60's RH.
You can get the Polysodium acrylate beads at Michaels Arts and Crafts stores. A little bag of these beads is less than $2.00.

Thanks for the clarification. Although you setup is more complicated than standard pillows, it sounds more reliable (and cheaper.) If I ever get around to setting up a cooler, this is exactly how I'll do it.