The Chantal tea ball teakettle features long-lasting stainless-steel components coated by an attractive ceramic finish. The nonreactive enamel interior prevents metal from reacting with the water, delivering a healthier, better-tasting tea. The kettle's smooth, flat base includes a quick-heating aluminum core, and is safe for use with ceramic, glass, and induction stovetops. You'll know the water is boiling once the genuine Hohner harmonica whistle sounds its two notes. In addition, the kettle offers a spring-loaded, stay-open flipper that keeps your fingers away from the steam while pouring and an extra-large lid opening for easy cleaning.