The latest innovation insight from Gama Compass™ MANCHESTER – 5th December 2014: Underlining the growing appeal of ‘extreme’ taste experiences, this week Gama looks at a new “sour” sports drink based on apple cider vinegar – Stu’s Sour Elixir 100% Pickle Juice. Promoted with the slogan “Gain power. Go sour”, Stu’s Sour Elixir from Stu’s Heritage Foods is a new vinegar-based product that is being advertised as an alternative to …