The 10 Oz. portable stainless steel thermos cup has great thermal insulation effect. Because it is crafted with great material, so the beverages will be kept hot for up to 6 hours and cold for up to 12! The double wall feature prevents condensation and burns, retaining the temperature of your beverage. The bottle is absolutely leakproof and shatterproof, making it the choice for rough-and-tumble use. Which is perfect for hiking, biking, boating, the gym, work, school, and home.