Totally Hidden The bike bottle holder conceals an AirTag inside the water bottle cage, keeping the tracker hidden and stealthy in an unexpected place. The integrated AirTag holder and bottle cage use six‑sided anti‑theft screws and a screwdriver design, making it not easy to disassemble. Special Customised Spaces The hidden bike mount is modelled to the AirTag size and fits tightly with no extra space, so it won’t wobble, rub, or scratch your bottle. Note: AirTag is not included. For bikes with a drainage structure to prevent stagnant water, the mounting direction also prevents rainwater from splashing in, providing protection. Signal Strength is not Affected Made from glass-fiber reinforced nylon, the holder does not affect the AirTag’s signal while you track your bike. No need to worry about reduced tracking performance. Rugged & Lightweight Bracket AirTag bicycle water bottle cage is constructed from glass-fiber reinforced nylon. It is lightweight (1.68 oz / 48 g), high strength, and aging resistant, so it can withstand impact or the bike tipping over. The AirTag bike case can easily carry more than 5.0 lb of weight. To Fit Your Bike Screws are the standard size for water bottle cages on most bikes with drilled holes, with extra tolerance to adapt to different hole spacings. Washers are recommended for a tight fit that matches your bike frame. The bottle cage diameter is approximately 2.76 inches (7 cm) and fits bottles from 2.68 to 3.15 inches (6.8–8.0 cm) in diameter. Note: Bottles that are too large or too small may not fit securely. Use scenarios - City commute in high-theft areas: hide the AirTag inside the cage for discreet tracking while keeping the bottle accessible. - Long rides and tours: reliable tracking plus secure bottle access, with drainage design to prevent water pooling and splash in wet weather. - Mountain or road bikes with standard bottle cages: compatible with drilled holes and adjustable spacing, offering a secure, wobble-free fit for bottles in the 6.8–8.0 cm diameter range.