This container in its large form is exclusive. The large round container was never sold by Tupperware, it was only awarded to the lead sales person of specific regions. All-in-One - From the freezer, to the microwave, to the table and back to the fridge for storing leftovers! With this range you can preserve, reheat and serve all in the same container, making clean-up a breeze! Perfect for OTG -You can take your favorite meal with you for lunch in a container that protects your food and your bag! Ideal for batch cooking - Prepare your healthy meals in advance and use the Vent N Serve to portion, freeze and save for later when pressed for time. View contents easily - the Vent N Serve container has see-through material that lets you recognize the food easily even when food is frozen. Dishwasher safe Do not use sharp or metal utensils Freezer safe (up to -25°C) Not safe for use in the oven Not safe for use with grill/broil function Safe for use in the microwave