Diet Coke has partnered with ASOS for a six week summer competition, The Treasure Hunk, giving customers the chance to win prizes including a limited edition personalised 'Share a Diet Coke' bottle encrusted with crystals.

ASOS will be hiding Diet Coke 'Hunks' around its site and users will have to crack clues on the Diet Coke Facebook page and asos.com to find them. One grand prize winner will receive a unique diamond-encrusted ring-pull pendant and sterling silver chain worth £4500, designed by award-winning jeweller Katie Rowland.