I bought this for work and have opened it and washed it once. Ultimately, I didn't bring soups and stews to work and ended up changing jobs, so it's unused. However, please understand that it has been opened, washed, and is a used item. Also, since it's unused, I don't know about its heat retention capabilities, so thank you for your understanding. 【Convenient Accessories】 A spoon and fork are included, so you can enjoy your meal right away, even when you're out and about. This makes it convenient for lunch or picnics. - Color: White/Purple - Material: Built-in stainless steel - Function: Soup jar - Accessories: Spoon/Fork Thank you for looking.