Re: Tiffin Box/Carrier - Where to buy in Zurich?
Coincidentally, I just bought one on Saturday in Basel at the oriental grocery store by the train station. Mine is a Zebra Thailand brand, but it's exactly what your photos show: three nested stainless steel tins with a handle for carrying. Cost me CHF 23.50. Not cheap, but the steel has a good feel, and the store gives 10% off if you have a customer card.
I'd try any of the oriental stores in Zurich. They're all over, I think, but I know for sure there's one at Kalkbreite (trams 2 or 3). I work in the area from time to time, and pass it on my way.