Tough days are no match for the 16 oz. AUTOSEAL Randolph Stainless Travel Mug [$23] with Lock. It embrace adversity with this double-wall vacuum-insulated mug, which keeps drinks hot for 4 hours or cold for 12 hours. It also features a one-touch AUTOSEAL button, with button lock, that automatically seals between drinks to protect against spills and leaks. The button toggles to lock and is conveniently located on the handle, which helps prevent accidentally pushing the button on-the-go. The lid pivots open for easy cleaning, and is top-rack dishwasher safe too!