After recently buying my first Brompton, I was never entirely happy with the bottle holder options. I wanted something for those times when not carrying a front bag as well as something a bit slicker than the stem-mounted options on the market. So after much trial and error and more test rides than I could count, I developed our custom, leather, seat post bottle cage mount. Each one is hand made in our Sydney studios and we can do custom versions on request. Reach out to us if you have any questions!