The Tupperware Rock N Serve Microwavable Bowls Set of 4 in Black with Lids are designed for convenient and versatile food storage and preparation. These vented lid bowls are microwaveable, making them ideal for reheating and cooking food. With a durable construction and lifetime manufacturer warranty, this set includes lids for each bowl. The sleek black color and compact size make them a practical and stylish addition to any kitchen. Sizes are 6 1/4 c, 1 3/4 c, 2 1/2 c and 3 1/2 c…. Plastics for description only… I took them out to wash them. NOS