physical

I am shipping (via Fedex) products (furniture) that need to be split into multiple boxes. Currently I have some products that ship in 5 separate boxes. I'm thinking that I need to figure out how to "attach" boxes to my product so that when it is added to the cart the boxes are added as well (but not shown). That way at checkout it would calculate the shipping for all the boxes.

Is there currently any way to handle this in Commerce? What direction should I go? I'm migrating from Ubercart and I'm not quite up to speed...

Thanks for any help!