I wanted to design a bottle mount below my bike frame. I dont have any screws on my Rose Backroad frame below the frame.

You need 2x M5 nuts in the adapter and 2x M5 screws to mount the bottle holder on the adapter.

To mount the bottle adapter on the frame i used cable ties. You can use 7x cables ties if needed.

I use 6x on my bike to be able to mount a 950ml bottle.

This is my first uploaded design.

I can upload more information if needed.