Not your run of the mill travel mug by Acera—this vessel was created with a patented tourmaline ionizing technology which helps improve the quality and taste of your drink. It features a tourmaline-crystal glaze that acts as a natural filter, helping to keep your water fresh while the double-wall heat insulation technology protects your hands from heat. Suitable for any type of liquid, it gives a smoother taste to beer and wine, reduces bitterness in tea, and makes drinking water taste more clear (it even can increase the longevity of flowers when used as a vase).