Premium Quality Materials: 20 Oz Travel Tumbler Is Made Of Premium Stainless Steel, Which Is Durable, Sweat-Proof And Rust-Proof, And Easy To Wash By Hand. The Funny Teacher Tumbler Comes With A Stainless Steel Straw Set And A Non-Bpa Lid | | Double-Walled Insulation Design: With Its Double-Walled Vacuum Design, The Insulated Tumbler Can Keep Hot For About 6 Hours Or Cold For About 12 Hours At Room Temperature. Even If The Outer Wall Is Worn, It Will Not Affect The Insulation Effect | | Leak-Proof Lid Design: The Lid Of The Holiday Tumbler Is Equipped With A Silicone O-Ring Seal And A Simple-To-Operate Sliding Opening And Closing Drinking Mouth. Two Straws Are Included, Whether You Prefer To Sip Directly Or Use The Included Straws | | Unique Teacher Present: The White Teacher Coffee Mug Features A Cute Rainbow Design And Comes With Words To Praise The Teacher, It Can Be Used As A Birthday, Graduation, Christmas, Thanksgiving Nice Gift To Express Your Gratitude To Her | | Su.