I always threw away the oil plug: a colleague told me what it was really needed for …

Now I will tell you everything in detail. The fact is that the plug must be put back in its place, but before that, you need to turn it over.

After that, press the cork inside the bottle so that it is fixed between the slots.

Since the plug is asymmetrical, there is always a small gap.

This gap allows you to dose the oil, that is, it will be poured in a thin stream.