Glass jars screwed to a shelf

I know, I know it has been too long since I posted something. There is no other way to explain it but to admit that I have been having too much unexpected fun at places where there are no internet connection. It's up to you to make your wild guess.

In a copy of Real Simple magazine is where I found today's creative idea: Glass jars screwed to a shelf. When I first saw it I thought they were glued or placed there with magnets. Maybe those are other options to consider when trying to achieve this simple way to organize your small items. Of course you have to be careful when filling them with heavier items.