This mug is absolutely incredible. Me and my SO both have one we love it so much. I just have two small issues with it (which are minor issues and don’t change my belief in this product). The battery life is about 2 1/2 hours at 125 degrees. For someone who wants to sip throughout the day it isn’t really marketed towards that. It doesn’t really last long if you have a good amount of windshield time or are moving a good amount. For those who refill throughout the day and have a desk this is amazing for! My other issue is the capacity of liquid it holds, it doesn’t really feel like much, even though it is. Maybe I just drink tea really fast but then that’s my personal issue. Overall with those being my only ‘issues’ this product is truly amazing and I love it so much.