Thank you for viewing. This is a set of two food storage containers that make rice taste delicious. The following is the information written on the side of the box: After freezing and heating in a microwave, the taste of rice from this product was compared and verified with a general single-layer storage container (the target product) by three rice-cooking experts. The results showed that this product's softness of each grain of rice was recognized to be 20% better than the target product. In addition, there was no uneven heating overall, and the overall score was recognized to be 10% better than the target product. See the photos for usage instructions. - Color: Yellow - Quantity: 2 - Size: 13 x 13 x 6.2 cm (with lid) - Material: Polypropylene - Features: Microwave-safe, with lid I received these as a gift when I purchased a home appliance about 5 years ago. I have opened the package, but I have never used them. They are unused, but have been stored at home, so please understand this before purchasing.