I purchased this set to use the large bowl to prepare yogurt in a yogurt maker that was supplied with those tiny jars. The yogurt is a vital entity in my required SCD diet so I make it a couple times each week. I had plastic containers available but was concerned about the safety of using them in hot applications, so these containers, which are heavy glass and easily microwaveable (and most likely oven proof as well) were perfect. And to have a top that fits right on when my yogurt is done is perfect, of course. I know this set will be much used, and is extremely durable.