The UK's Belu water brand, which donates all profits to the charity, will be available exclusively in all large Sainsbury's supermarkets from 23 April.
Every bottle of Belu purchased will support WaterAid's work to improve access to safe water, sanitation and hygiene in some of the world's poorest communities.
The range, made from 50% recycled plastic, includes still water in 500ml and 1.5-litre in single bottles and six-bottle multipacks, priced from 49p.
Launched in 2011, the partnership between Belu and WaterAid initially aimed to raise £100,000 a year for the charity, but the company recently revealed that it has raised over £199,000 in the first year alone, nearly doubling its pledge and helping WaterAid reach almost 13,000 people with clean water, sanitation and hygiene.
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