I use these to prepare frozen single serve lunches and dinners for my customers. I use approximately 100 per week. They are not my absolute favorite, however, they get the job done! The lids require some work to get them on, but once on they stay put! They will shatter very easily with frozen food inside of them. They are a good one use item that my customers can use again or choose to throw away based upon their choice. I have loaded everything from chili and taco fixings to enchiladas, chicken and rice, steak and sweet potatoes in these and no one has complained about the container being difficult to use or heat. A good value for the money. In the 200 hundred I have ordered 2 dishes and 2 lids have arrived damaged. Not bad for the lack of packaging. Again, a decent purchase.