Swivel cap and wide mouth: Thanks to the twist cap, the thermos bottle stays absolutely tight.The lid can be used as a temporary drinking cup so you can drink coffee on the way to work.One lid, two uses. 24h cold &Keep warm for 12 hours: Thanks to the double-walled vacuum insulation tested according to the strictest standards, your drinks in the thermos bottle stay cold for 24 hours or warm for 12 hours, no matter how warm or cold it is outside.The sweat-free design also prevents condensation or hot hands.And the tight-fitting cap reliably keeps the contents in the thermos bottle, more convenient and hygienic.Best choice for driving, fitness, yoga, running, traveling, cycling, camping, office, school etc. 316 Stainless Steel and 100% BPA Free: Made from LFGB certified 18/8 stainless steel, preserves the taste and purity of your favorite drinks while providing a healthy, sustainable alternative to single-use plastic water bottles.No Internal coating, 100% BPA free ensures that every sip of liquid you drink is free of pollutants and odor.No more worrying about rust or corrosion caused by bacteria and particles. Perfect design: Our thermos flask has multiple colors and two sizes to choose from.Our 450ml/550ml stainless steel thermos bottle is fair enough for children, but big enough for adults.