Kryptonite bottle cage lock

You can use it too, as long as your water bottle mounting holes are ~2.5" apart and can fit through a 0.2" through hole.

Also I wouldn't recommend using this design on an aluminum or carbon frame bike, because the water bottle mounting points are not designed to take this kind of load. My bike is thick steel from the 90's, so it should hold up fine.

You will also need a 3/4" #8 machine screw and the corresponding hex nut to attach the mount. If your dimensions are different than my bike, feel free to edit the SolidWorks file I've posted. Good luck!

Print instructions

Use an infill >20% so that it's strong enough, no supports required.

model from https://www.printables.com/@MAKR_110201 ; I'm reuploading it on my account in case it disappears