Junior Apprentice (The Final) Part5

It's the final of Junior Apprentice, and four tycoons of tomorrow remain to battle it out for the ultimate prize: a 25,000 pound tailor-made fund to kick start their business career.
Lord Sugar calls the candidates to the London Aquarium's famous shark tank for their final briefing: they must develop their own brand of bottled water. But in a market flooded with brand names, how can they make their brand stand out? And who will walk away with the 25,000 pound prize?