In case you don't have your smartphone app handy, the taps are equipped with LED lights to show the water's filter status as well -- blue means clean, yellow means not so much and red means you should probably get a new filter, pronto.
The "teabag" isn't the only interesting filtration tech on the horizon, and researchers in California are developing a filter that uses nanotech and silver to produce clean water.
Caerphilly-based RMB Security Services Limited's Lifestraw - A high-tech water-filter in a straw, invented and manufactured by Swiss company Vestergaard-Frandsen, which uses allows soldiers to drink clean water from any source while out on operations.