wow, I didnt know that ! and I have used plastic for years - well for all my cats, with no problems, but I am manic about washing them and I only use anti-bac washing-up liquid, wonder if that makes any difference ?
I'm sure washing them after every use with an anti-bacterial soap has been part of your good luck. I use stainless bowls but the dish is never used more than once before cleaning in the dishwasher. I have 8 bowls for food plus a water fountain so having a clean bowl for each feeding is never a problem.