They may look like ceramic cups that haven’t been washed in years, but these are genuine artworks made by British designer Tamsin van Essen.
Using various “foreign” materials, the artist managed to mimic the infestation of various bacterias on ceramic bowls. As real as the contamination with Salmonella and Streptococcus may seem, the bowls are perfectly clean and ready to be used. Even knowing that, I doubt anyone would be crazy enough to actually use them.