I once bought some fig rolls from Morrisons. I was chewing on one for a long time, thought it odd then realised that most of the fig bit was a thick blue plastic wrapping. I sent it back with a letter, partially out of disgust (I was gagging when I realised!) and also because it could have been more horrific had my toddler tried to eat it (I was thinking she could have choked on it etc.). They replied and said they were investigating, and gave me a £10 voucher as part of their apology. I then received a couple of subsequent letters detailing their investigation - it turned out to be part of the packaging of one of their ingredients that had fallen into the mix. Accidents do happen, I accept that, and I thought they were very thorough in dealing with it, and good of them to keep me informed. I didn't buy any more fig biscuits for several years afterwards though and I still get paranoid now!