Introducing the gold standard in reusable water bottles.SIGG Classic collection delivers all the benefits of a lightweight, durable, eco-friendly, leak-proof water bottle in a subtly, sophisticated style. Extruded from a single piece of aluminum and coated with a patented secret formula liner, this water bottle will not leach anything harmful into your beverage. It will not give your beverage any plastic taste or overtone. Good for you, good for the environment. No wonder SIGG is a celebrity favorite and has been featured on America's most beloved television talk shows.