US Patent 12001658 Content collections linked to a base item

Content sharing between a first user, a second user, and a third user is facilitated. A first public content collection includes a first input content item of a first user. Responsive to receiving an indication of a combination user input from a second user, a combination function is invoked to allow the second user to combine the first user input content item with a second user input content item to create a first combined user input content item. The first combined user input content item is stored in association with the first user input content item in a second public content collection. A third user sends a combination collection presentation user input related to the first user input content item. In response, a combination collection presentation function is invoked to enable the third user to navigate the second public content collection.