Boxed set of 9 storage containers that come in an easy to wash square shape. These versatile storage containers can be used directly from the refrigerator or freezer to microwave oven, for added convenience. The steam generated during heating in the microwave pushes up the lid, automatically releasing steam from the groove of the main body, making reheating frozen foods possible. The main container and lid can be stored separately for compact storage options. The lid and the container body doesnÍt have any hard to wash grooves, and comes in a flat shape that is easy to wash out with a sponge. Contains 3 400ml containers, 3 140 ml containers and 3 950 ml containers. Made in Japan. Food Container Yes