Threaded overhead shower gel Cap

Recently my upside down show gel cap was rot away and I decided to print a new one. The original cap was cheap material and had no silicone valve. My first tries to just print a new cap with a thin bottom and just cut a cross inside the bottom were failed. The gel was dripping endless.

So, here is my approach for a threaded upside down show gel cap with a valve from any upside down kitchen bottle, i.e. honey bottle, sirup bottle, BBQ sauce bottle ... I used the latter one and cutted this out of the empty bottle.

Instructions:

1. Cut out the valve from any upside down plastic bottle to fit in part 1.

2. Adjust inner diameter or thread winding in OpenSCAD (or leave it at 27 mm). Then print the 2 parts.

3. Knead a chewing gum or other sealing material into a ring slightly bigger than the open hole and put it in the inside of part 1.

4. Press the new valve through the ring from the inside of part 1. If it does not fit well, use a hair dryer to weaken and widen the hole.

5. Knead another small sealant ring and put it around the valve.

6. Press part 2 onto the valve. Again, if it does not fit in part 1, use a hair dryer to weaken it.

The hair dryer also helps you screwing the cap onto the shower bottle for the first time.

Credits:

The included script threads.scad is from Dan Kirshner - [email protected] with the following quote:
"You are welcome to make free use of this software. Retention of my authorship credit would be appreciated."