Fidlock TWIST is a system for attaching water bottles magnetically to the bike frame. As the name suggests, you have to twist the bottle in order to get it off.
The system works alright, bottles won’t fall. It may also be possible to install these to positions where normal bottle holder can’t, since they typically require some space above the bottle to be able slide it off. These only need the space for a little twisting motion.
That’s it for the positive sides. It’s very inconvenient to place the bottle back to it’s magnetic mount. Basically you have to feel around randomly until it clicks, or look down, which can be dangerous on a road. Traditional bottle holders are way more convenient to use.
Unless you really need to install a bottle to a tight spot in your frame, it’s not worth it vendorlocking yourself to Fidlock. A gimmic product range.