I bought a set of https://www.liquidsavvy.com/ water bottles from Amazon.

They've all got the same profile at the opening. So I modeled a handle in Fusion 360.

This is the 4-5 try. I kept trying to do it w/o wrapping all the way around. I don't think the bolt is necessary but it sure makes it really secure.

Print Settings

Printer Brand:

Prusa

Printer:

Rafts:

Doesn't Matter

Supports: