I saw an 18 piece set of Oso Fresh food containers for sale for $50 at Costco. They claim that some silver dust keeps food fresh 2-3x longer. I figured too good to be true. But I went home and looked it up....and check out the reviews (this is the same product, sold under Sharper Image brand):
also the costco price seems a good deal...same price for 50% more containers.
Problem: they apparently don't nest. Doh.