Join the Pipe is a project that lets you do your wee bit for the environment, and help those in need. It asks you to switch to tap water and give up bottled water. Which should be good for the environment. Also, they let you buy re-usable and durable water bottles shaped like pipes, proceeds from the sale going towards setting up projects in underdeveloped countries where people have little access to clean drinking water. As a social network of tap-water drinkers, helping get water to the underprivileged, we’ll say JoinThePipe is the way to go.