There are a lot of different factors to consider when purchasing a water boiler, such as price, capacity, warranty, and features. We've rounded up the best water boilers on the market so you can find the perfect one for your needs. If you're looking for the most affordable option, the Rosewill Electric Hot Water Boiler and Warmer is a great choice. It has a 4-quart capacity and features automatic shut-off and boil-dry protection. Plus, it comes with a one-year warranty. If you need a larger capacity water boiler, the Zojirushi Hybrid Water Boiler and Warmer is a great option. It has a 6-liter capacity and features three temperature settings.