It knows when to close - Life moves pretty fast- you need a travel mug that can keep up with you, without spilling coffee down your shirt. Luckily, the Premium Pinnacle is engineered to be spill-proof no matter what, with an AUTOSEAL lid that seals between sips. Thermalock vacuum insulation means that your drink stays hot for up to three hours, lasting you all the way through a morning of meetings. Finally, a travel mug that fits your life on the go- spills not included.