The agency will develop websites for all Lucozade's products, focusing on improving the brand's dialogue with consumers.
Fuse Digital has previously worked on the Lucozade Energy brand, but will now handle all GlaxoSmithKline-owned energy drinks, including Lucozade Sport, Lucozade Hydro Active and the Lucozade Sport Science Academy website.
Danielle Blanchard, brand manager for Lucozade Hydro Active, said: 'We are confident that the partnership will provide greater consistency across our brands.'