As a young professional, I often lament small, petty, everyday tasks like cleaning. This brand of Tupperware have been a life saver. I don't know how anyone can get by without these! I use them for every eating occasion: when I cook dinner at home, when I bring food to work, when I eat breakfast; gosh, I think the only time when I don't use these are when I need plates!
These are easy to clean. They are versatile: I can microwave, freeze, and refrigerate without fear of of ruining them (as with other ones) because they are durable. The lids even fit after all of the abuse I put to them (I hate it when lids don't fit!)