I wanted to attach my Tigr bike lock to the frame and needed another set of bottle cage mounts. I installed 5mm rivnuts to the the underside of the top tube. I could also use this mount for a water bottle. However, I think it would be preferable to mount a water bottle on top of the tube. If you decide to install rivnuts, I would recommend using ones made from aluminum. Installing stainless steel rivnuts would probably require an installation tool.