Santa's Weapon Exchange Coupon Box
If you use it, you can receive Santa's Weapon Exchange Coupon. If you're lucky, you might have a chance of also receiving a Weapon Exchange Coupon - Jackpot! Cannot be exchanged, dropped, or sold. Can be stored in a private warehouse.
Not dropped by monsters.
Cannot be spoiled.
The chances are official (x1). On servers with x10, x100 and higher rates, drop and spoil come more often.