Add your finely chopped herbs to a sterilized mason jar and add the vinegar. You will need to use a plastic lid as the vinegar will react with a metal lid even if parchment or wax paper is placed in between. I know there are dozens of tutorials on Youtube and Google, telling you to use parchment paper with your herbal vinegars, but the parchment paper turns black.It really is not a good solution. This is one place where you need a plastic lid or cork.