The latter will see 300 displays across the capital turned into measurements of Londoners' contentment levels.
The technology behind the happiness meters will measure the number of positive and negative words used on Twitter alongside the use of the hashtag #ChooseHappiness. The activity will also keep locals and tourists updated on further activities on offer from the brand.
As part of the same campaign, Coca-Cola is giving consumers the chance to taste all four of its product varieties through sampling at transport hubs, as well as via its Happy Tube Commutes. These feature branded taxis that allow users the chance to enjoy a drink on the road.
The company will also be delivering free Coca-Cola in cool bags to lucky Londoners lounging in communal areas and parks.
Earlier this week (6 July), Coca-Cola celebrated its partnership with Capital FM by hosting the radio station's morning broadcast in the newly-rebranded Coca-Cola London Eye.
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