Just pull of the top rim of the package, much like opening a zipper. Saving hassle means it's easier to use, as mindless as possible, with fewer instructions. Today companies say that packaging is just as important as advertising. The convenience was worth the expense. Recently I tried a frozen chicken pot pie that required 55 minutes in the conventional oven, but only 12 minutes in the microwave.
Microwavable meals call for a new set of container guidelines.
Metallic objects must be avoided in the microwave because of the danger of fire. Other materials may cause just as much concern. The American Plastics Council advises that if you can't find a manufacturer's instructions for microwave use, use a different container. Restaurant food carriers usually are not intended for the microwave, so you should transfer the food into a microwavable container. Also, microwave meal containers should only be used once.