Does anyone know where to glass that frosts instanly?

I need to know where I can buy and what the glass is called. Its usually installed in bathrooms. Its just a plane of glass that frosts for privacy when you flip a switch.

Answers:
Liquid Crystal Privacy Glass

Switch Light Glass gives you privacy glass in panels with polished edges on two sides or with edge protectors. Edge protectors are always required on the top and bottom to conduct the electricity to the panels.

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