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You can have your very own pitch black closed up sleeping bed. It has a cocoon-like cover that can be removed or left on for night time sleeping. I love the fact that you can just zip it up to make your bed. And of course you don`t have to sleep with it zipped but I am sure there are people out there that might! This is an interesting idea!
Image Source: http://www.ohgizmo.com/2010/10/27/i-hope-this-letto-zip-bed-wins-someone-the-nobel-prize-for-awesomest-invention-ever/