Not sure about a box like that, but Whitaker keeps his paints fresh by putting the palette in an old freezer. i can attest this works well, although I can see how having a lid would also add to the slow drying time. If you never do find the box or figure out how to build one, I posted how to build Whitaker's idea of a perfect palette
http://nataliehunsaker.blogspot.com/...t-palette.html . it's quick and simple if you care to do it. Good luck finding the box--and let us know how you did it if you build it yourself!
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