Key Features: 500 ML Capacity Keeps Drinks Hot Or Cold For 24 Hours Simple Threaded Lid For Easy Use 100% Rust Free Steel Copper Coating For Better Heat RetentionMilton Insulated Steel Bottles Are A Part Of The Thermosteel Range. Its Unique Temperature Retention Mechanism Keeps Your Beverages Hot Or Cold For 24 Hours. This Bottle Is Extremely Slim And Compact And Would Fit Easily Into The Side Pockets Of Your Bags.