The Stainless Mug Features A Lightweight Design For Added Portability- The Tight Fitted Flip-Open Lid With A Safety Lock Makes Drinking From The Mug Easy And Prevents Beverages From Spilling- Other Features Are: Air Vent On The Mouthpiece Allows Beverages To Flow Out Smoothly, Without Gushing Or Overflowing- Stopper Disassembles For Thorough Cleaning- Easy-To-Clean Nonstick Coated Interior- Specifications: Capacity: 16 Oz- / 0-48 Liter- Dimensions (W X D X H): 2-5/8 X 2-7/8 X 8-3/4 Inches- Weight (Lbs- Oz-): 0-08- Heat Retention: 189 Degree F At 1 Hr- / 160 Degree F At 6 Hrs- Cold Retention: 46 Degree F At 6 Hrs- Zojirushi, Japan Top Home Appliances And Vaccum Insulated Products, Since 1918-