Butter London is a nail brand used by designers Alexander Wang, Victoria Beckham, Calvin Klein, Issa and Vena Cava. Their products are formulated without the use of the harmful ingredients like Formaldehyde, Toluene, DBP or Parabens. Not to mention their nail colors-Dosh, Frilly Knickers, Fash Pack and Sloane Ranger, to name a few ($14 each).