I sent this complaint letter to Rubicon a few years ago, a little after the M&S meatball soup letter.
Dear Rubicon,
I recently had cans of your sparkling passionfruit juice and guava juice. The passionfruit was absolutely delicious and I have recommended it to my friends. However, the Rubicon flavour-design executives that worked on the guava flavour must try harder. I found it tasted reminiscent of sausages (both meat sausages and the Linda McCartney brand vegetarian sausage rolls). Now, although I do enjoy a good sausage as much as the next person, I take much more enjoyment from a fruit flavoured sparkling drink than I do from a meat flavoured sparkling drink. I must concede though, that your Rubicon flavour-design executives may be onto something lucrative here—have you tried marketing meat flavoured drinks to the French?
Yours Sincerely,
Me
I signed off with my real name, but never got a response from them. However, their sparkling juice does seem to taste better now, and I think it was me who made that happen.