Zojirushi’s proprietary double-wall stainless steel vacuum insulation keeps drinks icy cold for up to 31 hours Splash-Proof Transparent Lid with matching Straw, makes sipping easy Tumbler Dishwasher safe, hand-wash Straw and Lid; Fits most cup-holders, Wide Top opening SlickSteel polished Stainless Steel interior is easy to clean and minimizes odors and stains, Color Exterior with Textured Matte finish for easy grip Individually Boxed in English with instructions and care in English, Korean, and Chinese