Fidlock Twist Compact 750 Bottle Set – Smoke. The Twist bottle set 750 compact combines the height of a 590 with the volume of an 800 making it the ideal in-between option. Its voluminous design fits the same space as the Twist 590 but carries significantly more liquid perfect for narrow frame geometries. Retaining the popular design and ergonomic grip for intuitive handling it features a removable dirt cap and a self-closing membrane with a large water flow. The Twist bottles magnet-mechanical system eliminates the need for a conventional cage offering easy attachment and release with a simple twist secured by magnetic bolts and a mechanical lock mounted to the bike with two screws.