Finishing the cup

You're almost done with the cup! Except you might be looking at your piece and wondering – now wait a minute. Why is there a giant gaping hole in the middle of my piece? 

Never fear, there's a tutorial here:

Then hold your pill-shaped piece so that the end you just fastened off is on top. Use your finger to push the top of the piece down into itself, until that ridge of exposed front loops from round 9 form the rim of the cup.

coffee cup formation gif