Smartwater bottles are very popular among hikers. I’ve designed these simple collar rings that snap around the neck of the bottle, making the bottles easy to mark.
![](https://arcady.genkin.ca/wordpress/wp-content/uploads/2021/08/Smart-Bottle-Collar-v7.png)
The ring is very easy to print. I used PLA and PETG, and they work equally well.
Download the STL file for the ring here: