Heat retention: 180°f @ 1 hr. Cold retention: 45°F @ 1 hr. Stainless steel vacuum insulation minimizes heat transfer to keep exterior from getting hot, and minimizes condensation Removable stainless steel mesh tea leaf strainer for direct brewing and sipping; can be used with or without tea strainer Twist & seal Spill-Resistant Lid that disassembles for thorough cleaning Made of BPA-free plastic and stainless steel Included Components: Stainless Tumbler And Lid