Unfortunately this is not an option at the moment.
For example, if you offer 3 sock styles independently:
...and you also want to offer a combo pack of those 3 styles, you would not be able to create a "reference" Product that is connected to the 3 original Products.
You may want to do this to connect inventory so when 1 pack is sold, it deducts 1 unit of each color. However, it is not possible on our platform at this time.
You would need to represent the pack as its own Product (e.g. SOCK-3PK-REDWHITEBLUE) with totally independent inventory count.