Thank you for viewing. I have only used this item three times after purchasing it. The performance is excellent, but the size doesn't quite fit me, so I'm putting it up for sale. There are no noticeable stains or scratches, but please understand that this is not a brand new, unused item before purchasing. The following information is from Amazon: Stainless steel, plastic Reusable, food grade 9.5 length x 9.5 width x 11 height * Size: Width 9.5 x Depth 9.5 x Height 11 cm * Weight: 0.25 kg * Material: Stainless steel, PP, silicone * Country of origin: Thailand * Heat retention (6 hours): 50°C or higher * Cold retention (6 hours): 11°C or lower