Pick up the [Toasting Goblet] and mail it to a bank toon after the thirty days then it will be returned. As long as you keep it in the box until you need it, it shouldnt count down. (Source: well it worked with the brooms, why would this one be different)
If I happen to be wrong please flame me and spit on me, maybe call me names, what ever makes up for the inconvenience I've caused you!
Mat
[Toasting Goblet]
EDIT I suppose I should say that it gives + 20 stamina, its good for twinks who have friends they always run with. A friend and I both stocked up for each other in BG ;-)