Features . Collapses flat for compact storage. Use collapsible storage bowl set to pack leftovers for lunch and reheat in the microwave. When done using the storage bowls collapse down to 1 3 their original height for convenient storage in a drawer or cupboard. Saves approximately 2 3 more space when storing features rigid plastic rim and base. Includes Snap on plastic lid for storage and transport. Microwave freezer and dishwasher safe patented