Military grade anti-shake fixing, wild waves don't spill Six-jaw elastic carabiner: suitable for 500ml-1.5L water bottles/insulated cups/cans, through 360 ring pressurized design, even if the kayak is violently bumped or the surfboard is vacated, it can still lock the drink firmly, the measured impact resistance is up to 50N. Quick installation without drilling, suitable for all boards High-strength non-slip rope + adjustable carabiner: one loop around the kayak seat/surfboard foot rope fixing point, 3 seconds to complete the installation, no drilling or gluing, no damage to the board body, no residue after disassembly. COMPATIBILITY TEST: Compatible with 99% of water equipment such as SUP paddle boards, fishing kayaks, tailwave surfboards, etc. The rope is load-bearing up to 100kg, and it will not come off after wildly flinging. Fully waterproof and rustproof material, no worry about immersion The main body is made of ABS engineering plastic + 304 stainless steel screws, salt spray test 480 hours without corrosion, seawater immersion for 30 days does not affect the strength of the service life of 3 times more than ordinary cup holders.