It's constructed of powder coated 18-8 double wall stainless steel and has a sturdy metal handle that fits up to 3 fingers. The push-on lid is made of premium BPA free acrylic and swivels closed to prevent spills. The synthetic cork bottom adds style while adding surface grip. Double wall high quality304#(18/8) stainless steel body, PP lid: non-slip bottom Double wall keeps liguids hot or cool for 6-8 hours No leaching and toxin free.Re-usable & Durable. Streamlined to fit into rucksack. carhole. Usedfor:officecoffeetravelauto mua and advertisement sales promotion best choice