Tau (water)

Tau is a British brand of still and sparkling bottled water.

Tau went on sale in 2003, and is available in 750ml (25 fl oz) or 330ml (11 fl oz) bottles. It is sold by the company which produces Tŷ Nant mineral water, who drilled a new borehole into their spring in Llanon, Wales, from which to draw water for their Tau range. Sales for the product were "excellent" in its first year, with main buyers being restaurants and hotels. The product is not available through retail outlets.

"Tau" is a Welsh word meaning "to be silent".