At first glance, beautiful, at second glance strong defects

The bottle was very nice at first glance. However, they showed strong when filling defects. The caption noted that the bottle is 100% tight. Unfortunately this is not true. When filling with carbonated beverages unfortunately the bottle keeps not tight. With the capacity of 0.6 L it would be ideal in order to fill it with water even aufgesprudeltem my SodaStreams. Unfortunately, the bottle does not fulfill its purpose and therefore has no value for me. Other disadvantages show up on the cover: liquids catch the retaining ring and the rubber ring (gray). While drinking the liquid from dripping on the clothes.
Conclusion: For the appearance, there are 2 stars. For anyone who does not want to be filled with carbonated beverages, this bottle is a good option.