This 28oz tumbler features a copper-lined, vacuum-insulated liner that maintains optimal drinking temperatures up to 10 times longer. Its dual-walled stainless steel construction, combined with a lead-free vacuum seal, ensures durability and safety. The design includes a screw-on lid with a metal handle and a built-in flip straw, along with two detachable internal PE straws for convenience. The sweat-free design and powder-coated finish, complemented by a stainless steel top rim, add to its aesthetic appeal. It comes with a 1-year limited warranty and should be hand washed only.