My family shops at the grocery store Whole Foods pretty often, and we always come home with tons of paper bags and lots of plastic containers (which are used to store the fresh foods, nuts, etc.). One way my family and I have decided to reuse and repurpose these containers is by putting our leftovers in them. They are the perfect size for a refrigerator and they are easy to clean. We reuse the sturdy paper bags for transporting miscellaneous things when needed.
If you would not like to reuse the plastic containers, you can always recycle them at your local participating Whole Foods: http://blog.wholefoodsmarket.com/2009/01/gimme-5-recycling/