Amazon Registry Box?

If I completed my registry, and every category has a check mark, then I bought something for $15 off my registry, does it automatically send me my box? Or do I have to order it somehow? I just completed the checklist and bought a $15 wubbanub, but I didn't see anything about a registry box. 
Edit: Okay! I found it. Complete checklist and join prime have a check mark beside them, but there's no check mark beside purchase from registry, even though I already purchased something for $15. The item I bought even says purchased beside it on the registry. Do I have to wait until I receive the item or what? Thanks for all your help!