Stand the 4-inch, 6-inch and 8-inch diameter pipes upright in a row from smallest to largest, side-by-side.
Apply PVC primer and cement to the bottom ends of the pipes and on the inside of the 4-inch, 6-inch and 8-inch pipe caps using the built-in applicators in the primer and cement containers.
Press the caps onto the bottom ends of the corresponding diameter of pipe. The primer and cement will form an instant bond. Stand the pipes up in a row, side-by-side, from smallest to largest.
Apply PVC primer and cement along the sides of the pipes where they join. Press the sides of the pipes firmly together to bond them permanently. This should create an organizer that consists of a 4-inch diameter pipe bonded with a 6-inch and 8-inch diameter pipe to form a row. You can drop small personal items into the opening on the top end of each pipe to sort and organize them quickly. The organizer stands upright anywhere you need it in the bathroom.