Here is another smart mug that keeps your drink warm for hours. This particular model has 2500mAh battery and lasts up to 8 hours on a single charge. The VSITOO S3 Temperature Control Smart Mug has a touch button that lets you easily adjust its temperature. You can also control the temperature from your phone.
This mug is IPX7 rated. It has a temperature range of 96-149F. It has double-layer vacuum stainless steel construction with food grace ceramic acrylic paint.