The best just got better! The Contigo(R) West Loop AUTOSEAL(R) 20oz Vacuum Insulated Travel Mug features an easy-clean lid and has a thoughtfully designed lid that pivots open making it easy to clean. This mug features the one-touch AUTOSEAL(R) lid that automatically seals between sips to prevent spills and the new lid-lock button prevents the AUTOSEAL(R) button from accidently being pushed while on-the-go. The travel mug provides convenient one-handed drinking for both left- and right-handed users and fits most car cup-holders. This Thermalock(TM) double-wall vacuum-insulated mug is engineered to keep drinks hot for up to 5 hours or cold for up to 12 hours, without a sweat. We mean that literally, because this vacuum-insulated mug keeps your drink at the optimal sipping temperature and eliminates condensation for dry hands.