Contigo AUTOSEAL Randolph Stainless Steel Travel Mug Vacuum Insulated, 16oz, Midnight Blue Patented autoseal lid protects against leaks and spills by automatically sealing between sips Vacuum-insulated double-wall stainless steel keeps beverages hot for 4 hours and cold for 12 hours Flow-control spout for convenient sipping and increased aroma Top-rack dishwasher-safe lid hinges open for easy cleaning Fits most standard car cup holders and single-serve brewers