My complaint:
I poured a can of Guinness into a pint glass, as I was drinking the Guinness a long strip of plastic went into my mouth, fortunately I detected this before I swallowed or choked on it.
Suggested solution:
Take this up with their quality control department, as I could have very easily ingested this or choked on it. It gave me quite a fright. I would expect some recompense for my ordeal. See photo.