Today I bought myself a nifty thing at Bass Pro.
It has two zippered compartments with 10 zip lock-type bags in each one.
Knitting needle storage! I had read about these Finesse Binder Bags being great for organizing circular needles in a couple of places on the Internet (Ravelry, Knitter's Review). On the Bass Pro website there's even a review for this item by a knitter.
There are zippered pockets on both sides. There are also replacement bags but the ones I bought today didn't fit. I'll try to exchange them on Saturday when I'm in that area of the GTA again.
I did leave one like this (a double) behind after selecting the ones I bought myself. But they had lots of singles in medium and large sizes. The other two sizes cost a few dollars less. They're also available online but beware, the prices online are in US dollars. It comes to about $26 Cdn. including taxes.
You can order one for yourself here. Go for it!