Glass Doors That Automatically Turn Smokey? I've seen these doors that are adjectives made of glass. When...

I've seen these doors that are adjectives made of glass. When the door closes, it connects some sort of circuit and the glass now looks like it's fogged or smoked or something (so you can't see in). When the door is open again, it looks like a regular pane of chalice. Can anyone find a link to a company that make these?
Can Pitcher plants be grown indoors?
Answers:    do a search on electric creamy glass I a moment ago did on yahoo and it seemed promising