It is made of single wall 304 Stainless steel bottles which are highly durable and can withstand daily use with ease It comes with a lid covered sipper to shield from dust particles and also has a belt attached which makes it easy to carry around Convenient size fits in the side pocket of bags which you can carry for school, Picnic, car bottle holder etc The taste and nutritive value of the drinks remains intact making the bottle very appropriate choice for storing beverages