Some other potion sugestions for you:
A drinkable sunscreen, very usefull in tropical and desert areas as you can protect your skin and hydratate yourself at the same time.
Energy drink for beasts of burden and/or mounts, for slower stamina consumption; alowing faster travels and longer periods of work.
A hunters potion, enabling something like a "detective mode", but focused on hunting a specific animal/creature. Could have diferent recipes for diferent animals.
A potion that slowers the process of aging of your characters, but just the appearance; Like most anti aging produtcs sold today.