Fully parametric cap for squeeze or pour bottles

I made these for 250ml and 125ml soft (HDPE or PETE) liquid bottles. The ones for e-liquid normally come with a twist-top cap that has a lot of backflow and leaks all over the place. Their tip is also extremely wide and I wanted something thinner.

This fixes both issues and after modeling it in OpenSCAD I made it fully parametric. You can adjust:

• Cap internal diameter (Cd)
• Cap internal height (depth) (Ch)
• Cap wall thickness (Ct)
• Spout major diameter (Sd)
• Spout minor diameter (Sm)
• Spout height (Sh)
• Spout thickness at base (St)
• Spout thickness at top (Sp)
• Height of thread start (Ti)
• Thread turns (Tt)
• Thread pitch (Tp)
• Thread height, the difference between Dmaj and Dmin (Th)

• Thread thickness (width of ridge) (Tw)
  IMPORTANT: If you are using these for anything that goes inside your body, use food safe filaments and common sense.

  To-do

  I can't get the ends of the threads to end smoothly. If you are an OpenSCAD guru, please have a look at the code. I'd appreciate the opportunity to learn a new trick or two.

Print instructions

Rafts: No
Supports: Yes
Resolution: 0.2mm

Notes:

• Use supports for the center threaded portion, to support the top; but you can increase the support distance in XY so that the plug comes out better.
• For some reason Slic3rPE feels the need to extend the supports all the way inside the spout; if this happens to you just add a support blocker for that portion.