The move follows the appointment of Karmarama and Goodstuff to handle its creative and media planning accounts respectively.
Airlock will relaunch the brand's website, including the addition of interactive content, as part of a £1m push to increase awareness of Taut. An integrated campaign including press, digital, outdoor and events is planned.
The brand was repositioned in November as the only 'clean' sports drink, as it contains no artificial colours, flavours or sweeteners.
The drink's packaging was switched from pouches to bottles that feature a grip for active consumers.
The drink is endorsed by the British Triathlon Association, athlete Darren Campbell and ex-rower Matthew Pinsent, who is a shareholder and on the associate board.
Previous marketing for the brand included sponsorship of the Rainforest Foundation 10km run in London.
Launched in 2003, Taut was founded by South African Vincent Baasch and Sarah Lang, former new-business director at JWT London.
The range, comprising the basic isotonic drink and an Endurance variant, is available in some Waitrose, Tesco and Sainsbury's stores, as well as health clubs and organic supermarket Fresh & Wild.