The refreshed design will be based on a positioning being developed by Tango's in-house team and its lead creative agency, BBH.
Britvic will support the relaunch with a digital-led ad campaign also created by BBH, which was appointed to the account in June without a pitch.
Separately, Coca-Cola is relaunching Lilt this summer in a bid to reinvigorate sales.
The overhaul, which includes packaging created by Epoch featuring blue Caribbean skies and images of fruit, is intended to revitalise the brand's 'Totally tropical taste' message.
A sponsorship campaign, created by Mother, comprises 10-second break bumpers featuring a 'Lilt parrot' character to air around ITV2's daytime programming.