To add a product login to your vendor dashboard with your email and password: https://bevv.com/login/
Once logged in - if you aren't taken to your vendor page, scroll to the bottom of the site and click the word vendor login (voila!).
Click on the upper left where it says 'Product'.
Click on the upper right where it says 'Add'.
Follow the steps!
The video tutorial is below - click on the image: