Osman's Potions

When Osman hands you a potion it comes in a small vessel that looks something like this, stoppered with a plug of 
wood sealed with tree sap and slightly blacked by the fire it was brewed over, then marked with an ancient rune. When you drink it you can taste the woods, the earth they grow from and just the right amount of rosemary & time (a trick he learn from a friend) some people find it unpleasant, but he relishes it as some would the flavours of the woodlands singing through the flesh of the majestic stag