There's some stubborn residue, possibly limescale, and surface scratches. Thermos Stainless Steel Vacuum Insulated Mug 350ml Espresso JNS-351 ESP A dark brown, one-touch open water bottle made by THERMOS, with a sealed drinking spout for convenience. - Brand: THERMOS - Color: Dark Brown - Cap Design: One-touch open - Internal Structure: Sealed drinking spout Thank you for looking.