Using the idea of ancient door bolts and modern craftsmanship to make bolted water cups.

Using the craft of ancient door bolt to make a water cup

The water cup is cylindrical as a whole, which is controlled by the pull-loop switch to pull down. The spring in the cup jugs the bottle cap, and the pull-loop switch has a certain range of motion.

The pull ring goes up, and the mechanism in the cup locks the bottle cap.