Dalida, I do the same with my yogourt and margarine containers.  They are the best for freezing.  There is also a kind of instant coffee I buy sometimes that comes in a rectangle tin with a plastic lid on it.  It's a cute size and just perfect for storing my and my daughters hair clips and elastics, or some small toys for the kids.  I use scrapbooking paper scraps to cover the tin to make them prettier too. 

One thing I saw at the farmers market that I thought was a great idea, was jeans repurposed as reusable shopping bags (cloth bags).  The lady had sew them just the right size, and jeans are so thick and tough, they would last forever.  I had bought some reusable bags from a grocery store one time and they are almost like material mixed with plastic and they keep ripping.  They will replace them for free, but it kind of defeats the purpose if you have to keep replacing them.  I wish I had a sewing machine so I could make some jean ones. 

Thats it, Im out of ideas.

I wish there was something else I could find for the bulk food stuff, I bought glass containers but I need more and don't want to buy anymore new things.

I use the big soy yogurt containers for stuff like granola, dried beans, etc.  Glass jars come in all sizes, I use nut butter jars to hold EVERYTHING from rice to nuts to beans to agar, etc.

I also use those big plastic containers that you get salad greens in to hold various things.  I have one under the bathroom sink for bathroom stuff, in my desk for office stuff, etc.