The Yusui Magic Flask is one of the most common—and most useful—artifacts in the Empire of Myoo. Found throughout every kingdom, it is considered indispensable by Mages, soldiers, and travelers alike, especially during long expeditions across mountains, forests, and hostile lands where safe drinking water can be scarce—or impossible to find.
At first glance, it resembles an ordinary flask, but it is forged from a lightweight metal of extraordinary durability. Its entire surface is etched with delicate magical engravings that sustain the enchantment sealed within. The oldest and most valuable examples bear the ideogram 湧 (Yū, “spring”) engraved on the cap or the base, a symbol of the magic that flows through them.
Its most remarkable property is its ability to replenish its water automatically every time it is opened. It never needs to be refilled and requires no assistance from a Mage. The enchantment endures for the lifetime of the flask, ensuring an unfailing supply of fresh water whenever it is needed.
Because of its unmatched reliability, the Yusui Magic Flask has become one of the most valued and widely used artifacts in Myoo. For many travelers, it is little more than a convenience. On long expeditions or in the midst of war, however, it can mean the difference between life and death.