The 30 oz copper-lined stainless steel tumbler is a BPA-free, vacuum insulated stainless steel double wall tumbler. and keeps beverages hot for up to 8 hours and cold for up to 18 hours. The spill-resistant slide closure lid with a rubber gasket. This makes a great employee gift, trade show giveaway, this makes a great advertising piece for colleges, booster clubs, customer thanks.
