While the bottle cap is removed by a standard wall-mounted opener, the fun starts when the cap falls through a wooden labyrinth of various mechanisms reminiscent of a Rube Goldberg machine.

The margin should be a tad narrower than the diameter of your bottle caps. When you're done making the margin, cut out the larger circle. From here, build a cylindrical wall with bottle caps and ...

Make sure the tape covers the entire back surface to ensure a strong and secure hold when affixed to the wall or another surface in your bathroom. Carefully stick each bottle cap onto the desired ...