I couldn't find the free printable files for this product at the time, so I decided to design one myself. Although the finished product wasn't perfect, it could just barely fit snugly on my wife's water bottle - the cap of her bottle was broken, and I didn't want to spend a lot of money on a brand-new cap, haha.

I chose PLA material for printing and added a tree-like support structure, so the post-processing was almost negligible. All I needed to do was slightly polish the edges to make the corners smoother and more rounded. However, it took me a lot of effort to install these accessories on the bottle body. I wanted to optimize the design further to improve the user experience, but I just haven't had the time. If there are more interested friends, I'd be happy to organize the design files into F3D format and upload them so that everyone can modify and improve them further!