We incorporate a revolutionary new patented technology in the drinking mouth. Easy to use. Even though it is a straw type mouth, it is also recommended for carbonated beverages with excellent seal. The gas generated from the carbonated drink is aligned with the valve to the position of the AIR to escape. This new technology prevents soda from spilling and allows you to drink without tilting the bottle upward. Great for sports and leisure occasions. SIGG is a professional manufacturer of aluminum bottles, founded in 1908. SIGG aluminum bottles are produced in our Swiss factory under strict quality control and are exported to more than 50 countries around the world.