Pure taste, modern style. The tourmaline lining of the acera honey bee travel mug heightens the flavor and freshness of any beverage. With a handcrafted honeycomb design, the ceramic outer layer has a unique look with its golden honey bees. Moreover, the double-wall ceramic design preserves the heat of your favorite drink for up to 90 minutes. Finally, the abs tritan bamboo lid effect completes the look of this luxurious travel mug that enhances the quality of your lifestyle. Every acera tumbler is crafted with beautiful designs using an excellent engraving technique. The act of drinking water becomes not just a practical activity but one you can enjoy and from which you can derive simple aesthetic pleasure. Tourmaline anion - patented far infrared and negative ion technology. The tourmaline lining of the tumbler heightens the flavor and freshness of any beverage. The tourmaline's charged negative ions add a pure taste, while neutralizing harsh chlorine and other impurities.