Sodastream Source
Whether you're concerned about your impact on the local landfill, or you just like the idea of carbonating your own beverages at home, the Sodastream Source ($130) gives you the bubbles you crave without all the excess plastic bottles. This elegantly-designed device lets you carbonate any drink, from tap water to soft drinks. The included plastic bottle has a metal base and top, is completely reusable, and will last a while — compare that to those disposable bottles you get from the local grocery. LED lights on the machine's face let you accurately gauge your level of carbonation.