When you drink water and try not swallow it and let it drip down your throat what does it stop it?

When you drink water and attempt not to swallow it, the sensation triggers a reflex called the swallowing reflex. This reflex involves a complex coordination of muscles in the throat that momentarily prevents the water from going down the esophagus. The epiglottis also plays a role by closing off the airway to prevent aspiration. Essentially, your body instinctively controls the movement of the liquid to ensure it goes down the right passage.