The stainless steel tumbler is made of stainless steel and it has stainless steel outer with black polypropylene inner lining, and it can keeps beverages hot or cold for 2-3 hours. Great for campus events/school pride, charities/fundraising, outings at the pool, travel and so much more.PMS available for product color and imprint. Overseas production. Lower quantity available. Includes ocean freight which are delivered to NY.