Odd... I got mine at Migros Löwenplatz last year. Also measuring cups which look more like little pots (they all have a handle). They're made from metal and the handle is covered with some red rubber-plastic stuff.
Maybe they are out of stock at the moment since it's so close to Christmas and either people needed them now for baking or got them as a Christmas present?

Like jacek said, you probably should ask someone from the store if and where they have it.
Another option might be Blattner AG at Seefeldstr. 17. (Take Tram No. 2 or 4 to Opernhaus or Kreuzstrasse, shop is between those two stops) Shop is closed on Mondays!!
I found my little nutmeg grater there after hunting for it in Migros, Coop etc.
Enter the shop and ask the guys at the counter right away what you're looking for. The shop is a maze and without help almost impossible to find what you want.