Taking a shower is better for the environment, and your wallet, than having a bath (which uses 80 to 100 liters of water). But a new power shower can use twenty liters of water a minute, easily putting out 100 litres in five minutes. Different showers mean water use varies from home to home, so while timing your shower is a good step, it doesn’t tell you how much water is being used.

The ECO Showerdrop is a low cost universal shower meter that is designed to let you know how much water you’re using and alert you when the recommended amount of water has been dispensed. The savings can be substantial in terms of water and energy: a family of four could save over $400 per year, as well as 40,000 liters of water and 2/3 tonne of CO2.