When I cook I rarely only make 2 servings. When I prepare meals for my husband & I from scratch, (which is the vast majority of the time) I prefer to cook at least double the recipe and then freeze the remaining for later. Square glass dishes are much better since they stack & store perfectly and clean up much better. Also once they are purchased, unless they break, they are reusable and don't fail in their integrity. To sum up they come in a variety of sizes, stack for storage, freezing and clean up perfectly and don't contribute to our throw away society.