Glengoyne isn't water...ya know! I still have my amaretto from a year ago and it's only half-way down.
Hey Wonka - my philosophy is that the stuff doesn't age anymore once it's in the bottle so what are ya waiting for??? Time to drink up! Trust me though, with what Glengoyne Scotch costs (especially 21 year-old Glengoyne) I will nurse and savor every drop!!