Autodrinking is a vanilla feature that functions as long as a drinking vessel is on your hotbar, but only works for water.
Non-water drinks restore stamina in a more energy-efficient method as of some patch some time ago, but the game won't autodrink from waterskins that have those drinks.
It would be much more convenient if they did, so you don't need to constantly stop, drink until 100% (and manually stop, since otherwise you keep drinking).
Last suggested in
May, but I made a new thread since that one was vague and had zero responses.
Queen of a cold, dead land. Caretaker of the sprucecaps.