Unfortunately, it is not correct. While the bottle keeps in carbonated beverages tight. By carbonic acid but an excess pressure is created on the straw and when one releases the mouthpiece pours a large quantity of the drink outside. Even with mouthpiece is open, the carbonic acid suppressed the beverage stättig over the straw outwards! Bottle is absolutely not suitable for carbonated beverages. Why the seller indicates this is a mystery to me. If the bottle buy a second time.