Tupperware Urban Lunch Set consists of two microwave reheatable containers and an airtight square container (Keep Tab). The containers all fit into a stylish bag making it perfect to carry a complete meal. Airtight Container: The New Urban Lunch set comes with a Keep Tab Small container which has a virtually airtight seal and is ideal for carrying dry food items. Spill-Proof Containers: It also contains 2 Crystal Wave mini containers which come with a liquid-tight seal and can be used to carry wet food items like curries or gravies. Vent for Reheating: The two Crystal Wave mini containers have a vent on their lids. Open this vent before reheating in microwave. Space Saving: When not in use, the containers can be nested or stacked, saving space in the kitchen. Carry More: The stylish Urban Lunch bag has ample space to accommodate these three containers and still has space to carry a fruit or other snacks.