YAESU 65th Anniversary Bottle made of stainless steel. - Brand: YAESU - Model Name: Celebrating 65 Year - Material: Stainless Steel - Bottom Shape: Flat Bottom *This bottle does not have heat retention and has never been used. I am listing it because I do not plan to use it in the future. As shown in the 8th photo, there is a small dent-like scratch near the drinking spout, but it was there from the beginning. Please be aware of this before purchasing.