We love brown-bagging our lunch; not only is it more economical and better for our waistlines, but it's also a good way to get rid of last night's leftovers. One of our favorite grown-up lunch boxes is the Zojirushi Mr. Bento® stainless lunch jar.Mr. Bento comes with four inner containers in different sizes, a spork with a plastic cover, and a zippered carry bag. The portion sizes are just right, the containers are microwaveable, and the interior of the lunch jar stays cold for several hours. Plus, it's lightweight and comes with a black carrying case that slings over your shoulder.