Okay you ask for it. I finally had a few seconds to take pictures.
Container with cup in the middle.
Put the paper towel over the cup, lean milkweed on the mound that the cup makes. This helps the frass roll down out of the way a bit.
Don't forget to put the top back on and make sure it is secure.
I put holes in the top with a corn holder to let out humidity and let in a bit of air.
When finished I stack them up to save room.