But not all bottles should be kept after use otherwise the bottle industry would die, I say that 1/2 or 1/3 times you use a potion the bottle would slip out of your hand and break on the floor, as the majority of the time you are useing a potion is either when you have no mana from casting or when you are fighting and quickly using potions.
There could be different messages in the text bar to show this:
Mana : ***** concentrates too much on magic and drops the bottle.
Healing potions : ***** drops the bottle in the heat of the moment.
Or there just wouldnt be a message, thus stopping spamming or we would start getting people making another town law: 'no drinking potions in town'
It would also add an element of realism.
Any criticism (not flaming or insults etc), or further suggestions would be appreciated.