Tinchilla

Just before I took early retirement last year, the design organisation I worked for developed a promotional product very similar to the Tinchilla for a major drinks company. It too used a couple of AA cells to run a tiny motor, and to rotate the case (via some plastic gears and a friction wheel) at about 20 rpm. I don't remember the rotational speed being desperately critical - it varied anyway with drag from the ice bath, and as the batteries expired.

The device worked amazingly well, and certainly cooled a canned drink very much quicker than putting it in the fridge.

Mike

Does the tin axis need to be horizontal? I can envisage a two gallon pail of iced water with a plank over it suspending a cradle on a string rotated by a ready made geared electric drive from the 'it'll come in handy one day' shelf. Easier to bodge one up than analyse it.

Might even chill a can of cider for SWMBO and earn some Brownie points.

Bill