How to create ZIP archive with relative paths

One question in SE site give me idea how to zip folder w/o including the current directory in the path. Here is the question:

I have a directory called folder that looks like this:

folder
      -> root_folder
                    -> some files

I want to zip this directory into zipped_dir..

And the answer I found was sample and effective:

Try to use this command (you will get the idea)

cd folder; zip -r ../zipped_dir.zip *

Maybe there is other way, but this is fastest and simplest for me :)

The lesson is that people must learn how to use relative directories :)
P.S. Here is the link to the Q/A in SE .