The Advantages of the Kettle Design: Double-Wall vs. Single Wall: · Keeps your water warm for a longer period of time · Acts as a heat insulator and guarantees that the outer body part of the kettle is safe to touch. Seamless Inner Shell vs. 2-Piece Inner Shell: · A seamless inner shell is easier to clean and doesn’t trap limescale in the crevices Stainless Steel vs. Plastic/Glass: · Stainless steel doesn’t create odors · Increased durability Note: Please avoid touching the outer shell of the kettle for a long time after it has boiled; the outer shell can play a certain role in insulating the temperature, but it is not completely cool.