This is probably the most expensive items I will put in this BLOG. Even free food is only as good as its' storage. This set came from Kohls and cost about $100. If memory serves, with a sale price, Kohls bucks, and points I paid $45 for the set. 

They stack nicely. The lids have a rubber seal that keeps out moisture and bugs. Seniors tend to have smaller living areas. The set doesn't take up much space. 

I've found similar sets at most big box stores. I chose this one because of the way the lids seal. Facebook swaps, Craig's list, and yard sales are good places to look for them if you have the time to wait and search.