code: def check_bottleneck(text):
      
      err = "mixed_metaphors.misc.bottleneck"
      msg = u"Mixed metaphor — bottles with big necks are easy to pass through."
      list = [
          "biggest bottleneck",
          "big bottleneck",
          "large bottleneck",
          "largest bottleneck",
          "world-wide bottleneck",
          "huge bottleneck",
          "massive bottleneck",
      ]
  
      return existence_check(text, list, err, msg, max_errors=1)
docs: Avoid mixing metaphors about bottles and their necks.
  
      source:     Sir Ernest Gowers
      source_url: http://bit.ly/1CQPH61