The tray and portion cups are made by Fit & Fresh, which means that they are probably made of non-leaching #5 polypropylene plastic, with no phthalates. Fit & Fresh has been ahead of the curve with their plastics, and they also are very good at thinking creatively about lunchbox solutions.
This particular set is nice because the tray keeps everything organized and neat in the refrigerator, and it's easy to stack, too. Also, the cups have their portion size printed clearly on the sides.
We wouldn't trade in our current set of plasticware for this set, but if we needed to buy new boxes for lunch and food to-go, we would certainly look first at these.
• Smart Portion Prep and Pack Tray by Fit & Fresh, on sale for $13.59 at Organize.com
Related: Fit & Fresh Lunch on the Go