Everyone has that friend. That friend that refuses to drink tap water, water that isn't cold or water without ice but what about refusing to drink unfiltered water? Everyone should be that friend. Although modern water systems in the United States are clean and provide safe drinking water, water supplied from a tap are just better left for activities such as a washing the car or watering the lawn, as they contain higher levels of salt and bacteria killing agents.
Water that has been subjected through further filtration, such as through a tap attachment or through a water filter pitcher, not only tastes better as it safely removes all harsh chemicals but also removes all salt and any agents that contribute to that metallic or copper aftertaste in tap water. This filtration method is known as reverse osmosis.
Reverse osmosis was initially observed by scientists in 1748, however, was an unused process in the scientific community until 1950 when it was first utilized as a process to desalinate seawater. The process of reverse osmosis is defined as a filtration method that safely removes molecules and ions from solutions through application of select pressure to the solution as it passes through a semipermeable membrane. This pressure is applied and as the solution passes through the membrane, the larger ions and molecules are removed, allowing nothing but a pure solution to filter through. This method is so effective because the semi permeable membrane stops all large molecules and ions from traveling through.
This process is the most cost effective (and safest) water filtration method to date and not only provides water drinkers with clean, pure water but also a cup of well-being, as it's free substances and all bacteria.