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		In action.
		Another view.
		With the other finish.

This Klein Bottle Opens Beers

The problem of beer  That it is within a bottle, i.e. a boundaryless compact 2-manifold homeomorphic to the sphere.  Since beer bottles are not (usually) pathological or "wild" spheres, but smooth manifolds, they separate 3-space into two disconnected regions: inside, containing beer, and outside, containing you.  This state must not remain.

A proposed solution  Clearly the elegant course is to introduce a non-orientable manifold, which has one side and does not divide 3-space, into the system. The stainless steel Klein bottle¹ shown above is an example of this class.  When juxtaposed with the closed 'bottle' described above, it acts to disrupt the continuity thereof, canceling the outdated paradigm of distinction between interior and exterior. This enables interaction between the beer and the self.

In summary  You need one. 

 
[1]  This sculpture is finished by machine.  It's smoother, glossier, more golden in color than the hand-finished version, and is unsigned. 

Klein Bottle Opener metal print, 3" tall - $78