Related: If you have this copy of a Harry Potter book, it could be worth $50,000 Child health expert Tamara Rubin - known around the world for her work in identifying the alarming levels of arsenic and lead in vintage Tupperware - has done some disturbing research into old Bunnykins pieces. Source: Lead Safe Mama Testing a 1967-1976 Royal Doulton Bunnykins Baby Bowl, Tamara discovered it contained 61,800ppm of lead - nearly 700 times the acceptable level.