Looking to cash in on some free rainwater, courtesy of nature’s bounty? Well, you can choose from various rain barrel types when you install a home rainwater harvesting system if sustainability is your game plan. It’s a great means of storing water to hydrate your garden and greenhouse plants or harvest your own drinking supply (once sterilized and filtered, of course). To help you decide, we have a list of the best rain barrels for water collection.Collecting runoff water in a rain barrel is an eco-friendly technique to keep a home garden hydrated all season. In regions where water shortages are common; and the cost of water is high, it can also be an efficient way to maintain water costs down during the summertime.