You can attach it under the bottle cage. It is made from high-quality materials that are durable and lightweight, ensuring that it won't add any unnecessary weight to your bike. The holder is concealed underneath the bottle cage, making it virtually invisible to anyone who is not aware of its presence.
eBay
Ulanzi Lino Phone Video Vlog Cage with Adjustable Handle for iPhone 15 14 13 Pro Max Cold Shoe Mount for Microphone Flash Light
Aliexpress UK
Screw wrench. for Field Monitor. HDMI Cable&Clamp. for FUJIFILM. for Panasonic. Power Solution. 💕New Arriva.
eBay
U Clip Phone Holder Extendable 62-87mm Width Clamp Cold Shoe Mount 1/4" ARRI for iphone Camera Cage Phone Stand Tripod Bracket
Aliexpress UK
It supports M-mount lenses or 17mm/37mm threaded lenses with an optional backplate. Supports both horizontal and vertical shooting. Includes cage, wireless side handle, side handle, spare screws, and user manuals.
eBay
NEEWER Phone Cage Case For iPhone 16 Pro/Pro Max Quick Release Video Rig Phone Stabilizer with 67mm Filter Adapter
Aliexpress UK
SmallRig x Brandon Li Mobile Video Cage for iPhone 15 Pro Max Co-design Edition 4473 1.Compact, lightweight and form-fitting cage for iPhone 15 Pro Max 2.Varied accessory mounts for microphone, LED video light, handle, tripod, hand strap, etc. 3.SmallRig's new quick release design connects accessories more instantly 4.Supports such lenses as M-mount lens, or, by replacing a backplate, 17mm / 37mm threaded lens, Moment T-series lens 5.Maintains access to all buttons, ports, radar 5.and ultra-wide-angle lens; fully compatible with MagSafe wireless charger.
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SmallRig 17mm Threaded Lens Backplate for iPhone 16 Series Cage, Quick Release Phone Lens Mount Adapter -5009
Aliexpress UK
Excellent quality - Just upgraded my iPhone to pro max.
eBay
NEEWER HD 60mm Telephoto Lens 2X Magnification for iPhone 15 pro Max/Samsung/Xiaomi Phone Cage Case with 17mm Lens Adapter
Aliexpress UK
SmallRig Mobile Video Cage for iPhone 15 Pro Max 4391 1.Compact, lightweight and form-fitting cage for iPhone 15 Pro Max 2.Varied accessory mounts for microphone, LED video light, handle, tripod, hand strap, etc. 3.SmallRig's new quick release design connects accessories more instantly 4.Supports such lenses as M-mount lens, or, by replacing a backplate, 17mm / 37mm threaded lens, Moment T-series lens 5.Maintains access to all buttons, ports, radar and ultra-wide-angle lens; fully compatible with MagSafe wireless charger.
eBay
TILTA Khronos Accessorise iPhone 16 Pro/Pro Max Cage Ecosystem Accessorise Mobile Video solutions For Quick Release Filter
Aliexpress UK
NEEWER 37mm Thread Lens Backplate for iPhone 15 Pro Cage (PA023) iPhone 15 Pro Max Phone Cage (PA024), Quick Release Snap On Phone Lens Mount Adapter Compatible with BeastGrip Lens Filter, PA035. 【For 37mm Phone Lenses & Filters】 This 37mm threaded lens backplate for iPhone cages can mount 37mm phone lenses and 37mm filters.
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Freewell Sherpa VND/CPL Filter 3-7 Stops Compatible with Freewell iPhone Series Cases & Genius Rig Cage Photography Accessories
Aliexpress UK
Stop treating your phone like a casual shooter—cage it, rig it, dominate it. The phone cage video rig instantly opens and closes via a lock and is compatible with MagSafe charging. Item Type: Phone Cage.
eBay
NEEWER 18mm 90° 2X Macro Probe Lens for Phone Cage/Phone Case with 17mm Lens Adapter Compatible with iPhone Samsung Xiaomi
Aliexpress UK