Starbucks Reserve® Stainless Steel Bottle Blue & Silver 591ml Stainless steel bottle with a beautiful gradation This stainless steel bottle features a gradation from a brilliant blue to silver. It has a double-walled vacuum stainless steel construction, providing excellent heat and cold retention. (Leak-proof: Yes) New, purchased from a store. Please understand and accept any initial scratches, and refrain from purchasing if you are overly concerned about minor imperfections.