The Klein bottle is a geometrical object, named after the German mathematician Felix Klein. Like the Möbius strip, it only has one surface. Mathematicians call this a non-orientable surface: a two-dimensional manifold against which a system for determining a normal vector cannot be consistently defined. Klein bottles only exist in four-dimensional space.
Effect[]
Klein Bottle is a material that can only be sold for money.
In both Persona 4 and Persona 4 Golden, selling four Klein Bottles at the TV extension of Daidara Metalworks will unlock the Yomi Sleeves for sale.
