This 350ml stainless steel water bottle is red clay in color and has excellent heat retention. It exhibits high cold retention due to its vacuum insulation effect. The Type M series is named "Type M" because of its shape, which resembles a milk bottle. Utilizing the know-how cultivated through the development of camping gear, we have created a bottle that is also useful in urban life. The stainless steel double-wall construction, with a vacuum created inside, blocks the influence of outside air and provides excellent heat and cold retention. Manufacturer Part Number: TW-351CL Size: 155mm × Φ74mm Weight: Bottle body 166g, Cap 37g Specifications: Heat Retention: 68 degrees Celsius or higher (6 hours), Cold Retention: 8 degrees Celsius or lower (6 hours) Materials: Bottle body: Stainless steel (exterior acrylic resin coating), Cap: Polypropylene, Packing: Silicone rubber Thank you for viewing.