Sports Water Bottle Insulated: The double-wall insulation makes the Bottle sweat-free! It keeps your drink cold for up to 24 hours, and hot for up to 12 hours. Premium Stainless Steel: The Iron Flask is made of 18/8 Stainless steel that is 100% BPA-free and non-toxic. It will never leave a metal taste or rust. Hand washes only with soapy hot water. Functional Design: The powder coat exterior finish is classic. It assures that you stand out with a very durable and elegant bottle. Our logo is now Laser engraved to assure the highest quality Warm Tip: We are carefully equipped with new straw lids, straws, straw brushes, sponge cup brushes, and new silicone protective pads to provide you with the best quality product experience.