This bottle is absolutely not suitable for carbonated beverages. Although the seller thereof in its description but claims. If one fills a carbonated drink (amount does not matter) and closes the bottle, a pressure builds up not only in the bottle but also in the drinking straw. When opened, not only the Trinkhalminhalt but also a part of the bottle contents on the drinking spout pours. (Gives a mighty mess) The amount is the pressure in the bottle depends. Remedy stem the slow opening of Hauptdrehveschlußes the pressure vent. However, this is only possible with two hands. Handed operation with non-carbonated beverages. I would not buy back the bottle.