Zirst Bottle Features Your Beverage Stays Cold for up to 24 Hours Flip Top Lid with Internal Straw on a Medium Mouth Opening Bottle is Sweat Proof and Eliminates Water Stains Perfect for all Activities like Biking, Hiking, Yoga, Golf, Exercise, Swimming and More! Double Wall 18/8 Food Grade Stainless Steel Construction is Tough and Strong Earth Friendly Reusable Bottle Will Save Tons of Plastic Bottle Trash and Paper Cup Waste Durable with a Lifetime Warranty Covering Manufacturing Defects