There are many different types of systems, from a simple, inexpensive pitcher to an on top or under the sink filter to an elaborate system for your entire house , or a shower filter . Avoid all soft drinks. They have no nutritional value, and they simply add calories, more sugar, and artificial, sometimes carcinogenic substances to your daily intake. Also, the carbonation in soft drinks interferes with the absorption of calcium in your body, and thus could be depleting your body of this important nutrient and causing your bones to get brittle early in life, even in your thirties. Osteoporosis is very debilitating, and is not only a condition of the old, or of women.
Men can have osteoporosis too.
Any natural fruit juices are healthy. Purple grape juice and orange juice contain flavonoids and are beneficial, particularly to your cardiovascular health . Both green and black tea also contain those flavonoids and are great in place of coffee. They contain caffeine and give you that kick you are used to as a coffee drinker, but they are better for your health in many ways. Both green and black tea are available decaffeinated for individuals who are sensitive to the effects of caffeine.