Thermos Stainless Slim Bottle 0.5L Blue (FFM-500 BL) Material Material: Main body / stainless steel (acrylic coating), glass / stainless steel, polypropylene, in line / polypropylene, lid packing / silicon, Sen packing / silicon Type of midline: FFM midline Cold insulation effect: 6 hours / 10 degrees or less Thermal insulation effect: 6 hours / 74 degrees or more, 24/46 degrees or more