What is it? Item from a Korben-Gondorf Strassi

Found this hanging on the wall of a straussi that we visited last Sunday to listen to Celtic Music. Of course, that has nothing to do with the use of this item. Neither do the cow bell in the background or the rack underneath. What is it? If you know, add a comment. I'll publish the answer in a couple of days.

Hint: Although it could be used any time of the year, it was especially useful in winter.

What is it? Solution

Martin was on the right track. It is to poke a hole in the shell of a raw egg. But not to extract the contents of the egg. Rather so that when you boil the egg, the air trapped in the egg can expand and not break the egg shell.

What is it?

I discovered this in Magda's vacation apartment in Badenweiler and had no idea what it was. Do you?

Notice that when the cover is pushed down a sharp point appears.

Hint: Magda says that one of these used to be in every German kitchen.

I'll post the answer in a couple of days.