If this proves to be clear as mud, I'll post a few pics soon. All it is, is a box I cut down from a larger box, with a baffle taped into the inside that runs from side to side, in effect creating a two-sectioned interior. The fan is one of those generic black plastic-housed fans that is angled up, and set on HI. Anything could be used to hold the hot beans, colander, etc. I just had this Tupperware square from a previous bean cooler.
I like it 'cuz the fans are only $10, and available anywhere, when this one gives up the ghost. Plus it's very quiet, and doesn't drown out Brahm's String Serenade serenely soothing the scene. Anything less would be uncivilized.