Any idea what this is

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In reply to by Racheesaw

Never seen one of those before. I'd be very interested to know what it is. 

It would certainly clean easier than mine.  

One part or two?  Does it reverse or flip over?

Lego life size, mortarless brick idea.  Prototype.  This would then be one side and part of a set.  

It also looks like it could be part of a vacuum form mould...  for forming perhaps packing for something expensive, and cylindrical.  flat sheets of foam could be dropped into it, heated and made curvy  to wrap around an object or to stack them.

Does remind me of the separation drip tray between a freezer and main chilling compartment of an old refrigerator.

Page 13 (link)

right down at the bottom of the page.  Sits in the bottom of a drawer and because of the dents and curves can chill cans and bottles faster and keep them from rolling around and possibly hitting or crushing fingers when reaching in and out.

Now... what happens if you bake in it???   It will certainly have some interesting contours when flipped out.