CO2 Reaction Bottle Cap

I made a DIY CO2 reaction bottle for my fish tank and bought a CO2 reaction bottle cap, but it broke after only a few uses. So, I printed this original author's bottle cap model from the model library [https://makerworld.com.cn/zh/models/1855704-zi-zhi-er-yang-hua-tan-shui-zu-xiang-ping-gai-v2#profileId-2053833]. However, the finished product was not ideal; it leaked, the cap was too large, and even with a sealing ring, it didn't work and wasn't suitable for soda bottles. So, I re-measured the dimensions of soda bottle caps and the structure of CO2 reaction bottle caps bought online, and re-adjusted the cap size and some unreasonable structures.

Required materials:
Oxygen tube with 4mm inner diameter and 6mm outer diameter

O-ring with 26mm outer diameter and 2.4mm wire diameter