Who knew that such a small convenience would make my day so much better? I usually have to wait forever for coffee to cool in my yeti cup, or get busy at work and forget it in the paper cup until it's ice cold. Keeping coffee the perfect temperature for however long I need it is SO nice during a year where literally everything has been inconvenient. I drive long distances several times a year and would LOVE a car charger. That's my only complaint.