Vacuum Insulation Creates an airless space between two walls, virtually eliminating the convection process and temperature change. Introducing Hetro's innovative water bottle! With its sleek design and advanced features, staying hydrated has never been easier. Made from high-quality materials, this durable bottle is perfect for everyday use. Whether you're at the gym, in the office, or on a hike, Hetro's lightweight bottle will keep your beverages fresh and cool. Stay refreshed and quench your thirst with Hetro's reliable and stylish water bottle.