Abstract: A container with active temperature control system is provided. The active temperature control system is operated to heat or cool a chamber sized to receive a beverage therein. The container includes an insulated vessel that has the chamber and a cooling or heating unit. The cooling or heating unit includes a thermoelectric element in thermal communication with the chamber, phase change material in thermal communication with the thermoelectric element, a power storage device, and circuitry to control the operation of the thermoelectric element. The cooling or heating unit is operable to increase or decrease or maintain a temperature of the beverage in the chamber by operating the thermoelectric element to draw heat from the chamber and transfer it to the module of phase change material.