This is a clear-design vacuum bottle made of stainless steel with a capacity of 350ml. 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 exhibits 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 (acrylic resin coating on the outside), Cap: Polypropylene, Packing: Silicone rubber Thank you for viewing.