How to choose the best name for custom post type?

Hello,

How would you choose a Post type name (or Post type key) for the register_post_type function for your theme’s support plugin?

Lets say I create a theme named Reeko and prefix as reeko. What would you choose name for portfolio custom post type.

  1. reeko-portfolio-item, reeko-portfolio-category, reeko-portfolio-tag
  2. portfolio-item, portfolio-category, portfolio-tag

I want to use the second one because a URL like the first one would not look good

  1. http://example.com/reeko-portfolio-item/%product_name%
  2. http://example.com/portfolio-item/%product_name%

What do you guys think about this? What does Envato recommend here?