Insulated stainless steel interior that regulates temperature and keeps the drink hot or cold for hours Convenient size fits in the side pocket of bags which you can carry for school, Picnic, car bottle holder etc Made of 18/8 Stainless steel bottles which are highly durable and can withstand daily use with ease Flip lid for easy sipping, Odor free, unbreakable, leak proof and easy to pour. Belt for easy carrying