Cover the inside of your duct tape roll with strips of duct tape. Cut several 4" long strips of duct tape, 1" wide. Lay those strips along the inside, overlapping slightly and folding over on either side.

Make your way all the way around the tape roll, overlapping just like you do when you create duct tape fabric (making sure all the cardboard end is sealed off). Next we want to create the bottom, take your circular piece of cardboard (that came with duct tape packaging). Place this directly (centered) under your roll, and trace with a ball point pen carefully around the outside perimeter.

Using your scissors, carefully trim the cardboard botom to fit.

Place a bead of glue all the way around the perimeter of the cardboard.

Glue the end of the roll to the cardboard circle. Place some more strips (4"long by 1"wide) of duct tape in your color of choice over the base until you cover the entire bottom (about 3 strips).

In order to fold up the edges of these pieces of tape cleanly, you will need to create tiny straight-line slits around the outside. Make tiny slits all the way around the circle.

Fold each small strip of duct tape up onto the roll. (Tip: Overlap some pieces to make sure they remain nice and straight)

You have essentially completed your bowl.  You can cover the outside with one long strip of tape if you like. If you are interested in the lid-making DIY, stay tuned for my upcoming video.