The wine enthusiast understands the height of the air-fluid level by the filling standard in a wine bottle. The renunciation of a right between corks and filling standard is very small at bottles filled newly, in the course of the storage it then comes to a partly insignificant decline by the evaporation due to the never one hundred per cent thick connection between nature corks and neck of a bottle, as a rule because alone the cork of highest quality is not elastic completely.
The probability of an evaporation is considerably lower at a professional storage as well as at a high-quality cork. Within the first 10 years no considerable ullage should appear.
At other bottle forms, such as Burgundian, Riesling etc., the description is difficult using the shoulder form. The filling level is measured by the renunciation of a right of the liquid standard to the bottom edge of the cork here. Besides it is to be marked that in the special with Burgundern the filling level of a bottle has substantially different logical value than for example with a Bordeaux wine. So a filling level of 7 cm only indicates a proportionately low risk over an over 50-year-old red Burgundian. A filling standard less than 5 cm is excellent for such a wine.