Could you imagine having to boil water before you drink it? Today, hundreds of bottled water distributors supply us with clean, filtered water saving us the time and hassle. Attempts to purify water date all the way back to 2000 B.C. The first methods include boiling or placing hot metal objects into the water, followed by filtering it through crude sand or charcoal filters (Baker & Taras, 1981). Even back in 2000 B.C. people wanted purified water because it tasted better, and good tasting water is associated with clean water. Today filtering water is easy and convenient, thanks to new and improved technology.