This vaccum beverage cup is made of 304 heat resistant
stainless steel surrounding its interior and 201 stainless
steel and both components function to keep contents
(either hot or cold) in perfect condition for longer periods of
time by diallowing the movement of air in the mug. This
beverage holder conveniently holds about 354mL/12 oz of fluid. It
should be hand-washed only and is not compliant to use in
microwaves and freezers. Its excellent matte color shade
gives that cool feel during its usage.