Stronger than the look
Although fairly thin, these have been quite durable and able to hold leftovers without any problem.  Unlike some reviewers, I have not had any problems fitting the lids, although you do have to line them up correctly, of course.  You can't boil food in the containers, but, as instructed, they seem to work in the microwave (leaving the lid slightly off so that air can escape.  I do wish these were sold with fewer containers; we had to give some to other family members because there were so many.
Rating: 4 stars