MASVIS Tumbler is made of 18/8 304 (top food grade) steel, has double-wall vacuum insulation & no sweat design, fits in standard sized cup holders, comes with a splash-proof lid which is smell- and BPA-free. What is in the package 1* 20oz MASVIS Tumbler 1* Splash-proof Lid WHY CHOOSE US? 1.Double wall vacuum insulation technology The tumbler has a vacuum space between the exterior and liner, which means the heat could not be transmitted through medium. Even filled with ice or boiling water, the tumbler will never get hot to the touch or sweat. 2.Food grade 100% BPA FREE, Non-Toxic To deliver high quality to consumers, this tumbler is made of 18/8 stainless steel with eco-friendly and BPA-free lid. No matter you use this tumbler for drinking water, beer or coffee, no liquid or smell will linger after it is emptied. 3.Easy to clean The large, wide mouth opening allows easy access to the stainless steel surface, eliminating hard to reach spots and helping you keep every inch washed - Hand Wash Recommended. 4.Multiple functions Perfect for travelers, students, truck drivers, bus drivers, taxi drivers, teachers, Mother's and Father's Day gifts, Christmas gifts, BBQ experts, party cups, sailors & more. You can take this tumbler anywhere: indoors, outdoors, sports, traveling, camping, driving & office.  5.Quality assurance Every tumbler went through strict temperature test before being put on shelf, so that you can rest assured of its quality. Your satisfaction is our main goal.If you're not 100% satisfied with your purchase today, we will refund 100% of your money, no questions asked! So Order Now