Drinkmate is the "Best Overall Sparkling Water Maker" by Treehugger
It’s intuitive to use, so you won’t be struggling to figure out all the steps. Place the CO2 cylinder in its compartment, fill the plastic bottle with cold water, screw into place, push the button, and you’re set. It’s available in white, red, and black and has a two-year limited warranty. Reviewers say they like that it's easy-to-use, although some commented it’s too tall to fit under some kitchen cabinets."Read more here!