A smart thermos that keeps the drink warm or cool. The thermos keeps your drink warm for up to 12 hours, perfect for trips out when it's cold outside! If it's in the hot summer and you need to keep the drink chilled, this thermos bottle can keep the drink cool for up to 24 hours. Should you forget your drink, the thermos will alert you when the hot drink starts to cool down and vice versa, the point of smart products is that you don't have to think too much. The thermos is made of stainless steel with double steel walls for good insulation, holds 750ml of liquid, and is powered by a rechargeable lithium polymer battery that is charged via an included USB cable. The display on the lid shows the current temperature of the liquid in the thermos.