Unfortunately, unless you're taking minute showers—more Shower vs bath water consumption that later—baths just can't measure up in terms of water usage. These funds and trusts could prosper if a way forward eventually emerges Will your travel insurance pay out if you can't get to a ski resort? Waterwise says consumption is so high in Britain because only 40 per cent of homes have meters. Well thenconsider this. What is a Green Card? A bath tub can hold up to 80 litres of water. How much would you save?