This is a Tupperware Rainbow Cooker 21cm shallow pot. It is unopened and has been stored for a long time. Inner diameter: 21cm, Capacity: 2.5ℓ The Rainbow Cooker has a 7-layer construction, with the bottom and sides of the pot made of four different metals layered together. It has excellent heat retention, is rust-resistant, and scratch-resistant. It uses one layer of stainless steel on the inside and one layer on each side, with two layers of aluminum (which has good thermal conductivity and is lightweight), one layer of aluminum alloy, and one layer of carbon steel in between, effectively utilizing each metal. This is why most dishes can be cooked over low to medium heat. It allows for easy and speedy cooking, expanding the variety of dishes you can make. The box is unopened. The box is not in the best condition due to home storage, but the contents are new. The box will be wrapped in bubble wrap for shipping. Please purchase only if you understand this. Shipping is included, making it a great deal. Thank you.