Ice Crackle Finish Bike Water Bottle Holder and Adapter Combo - White Blue

18-30oz Bottle Fit: Holds 18-30 oz or 550-800ml bottles perfectly (for / / / Tacx and more) Wide Compatibility: Two adapter spacers allow adjustment for diameters from 19-22mm and 30.8-33mm All-Terrain Security Hold: Flexible aluminum bottle holder holds bottles firmly, preventing drops on bumpy paths or off-road trails Handlebar or Seatpost Mounting: Can be mounted on handlebar or seatpost, horizontally or vertically Rustproof Aluminum Build: Corrosion-resistant aluminum alloy withstands daily commutes, mountain trails, and weather extremes