Their names are Emma, Eve, Felix, Paul or Casper and their promise is revolutionary mattresses. Sleep documents from the World Wide Web, which work on the basis of the one-size-fits-all concept, have been experiencing an enormous boom for several years. Subsequently, several start-ups were founded in Berlin - such as Bruno, Muun, Smood or Snooze-Project. The role model? Casper. The American company not only has prominent supporters but also venture capitalists who have already invested over $ 250,000. The result? Casper clones who felt mattresses needed just a funny name.