YT Thirstmaster 4000 Bottle Set Guaranteed to Make You Less Thirsty Live uncaged: the Thirstmaster 4000 does not need a cage, thanks to the Fid Lock Twist System, which combines the advantages of a magnetic and a mechanical snap lock. This system ensures a secure, rattle-free fit that holds the bottle safely in place even while jumping. Simply twist the bottle to release it; it's easy to do even while riding. No need to fumble around to put the bottle back either: just hold it close to the base plate and let the magnets do their job. The bottle holds 600ml of liquid, and thanks to the smoked-glass, semi-transparent finish, you'll always know when it's time to fill up again. And when you ride without the bottle, the small base plate is hardly noticeable on the frame. Features Designed to fit the Jeffsy MK2 CF 2019-2022, Jeffsy MK2 AL 2020-2022, Jeffsy MK3 2023-current, Jeffsy Primus 27 2023-current, Izzo MK1 2020-current, and Szepter MK1 2022-current Comes with 1 Fid Lock base plate, 1 bottle, and mounting accessories No BPA! Get it out of here! | Yt | Thirstmaster 4000 Bottle Set 4000 Bottle Set