Tupperware Ultra 21 3 Pc Cookware Set, 3 Qt Casserole. Ultra 21 Cookware, goes into the microwave, conventional oven, fridge, even freezer (plastic seal does not go into oven or microwave). 3 Quart Casserole with 3/4 Quart Cover (can be used as a separate baking dish), and Seal. Includes use and care instructions with recipes

Tupperware Rock N Serve Microwave Container 3.25 cup in Purple. Flop top vent on seal allows steam to release while heating in the microwave. Round shallow container holds 3 1/4 cups.

Tupperware Ultra Pro Oval Oven Safe 3.5Qt /3.3 L Lasagna Casserole Microwave New

this is a vintage tupperware covered casserole dish. it is from the “Ultra 21” line. It will hold 2 quarts. It has a top and bottom. It can also be used as a soup tureen (just flip the lid upside down) and there is an opening to put your ladle.

Used Rock N Serve container clear with country blue seal and yellow vent. Has a few scratches and marks from normal use.

Tupperware Tupperwave Starter Set 4 pc Beige Stack-Cooker 3 qt with 2 1/2 qt Colander and Cover in Beige. Also has a Sheer Seal.

This unique product is designed for the oven as well as the microwave to help you prepare meals. The product is dishwasher safe can be bleached to keep it bright and beautiful