Using the demo store as a template, I'd like to add more information to each product in my store, i.e. "supplier", "supplier SKU" and "supplier title". This is true for all products I want to carry in my store and I'd like to know if there is a "base" product where this additional information fields can be added? This so I don't have to add the same three fields to each new "content type" which I view as "product type".

Thoughts: