The design of the Donut Kettle Set Series is inspired by the donut, and its appearance incorporates the shape of double donuts, making it non-slip and comfortable to hold or unscrew the lid. The pure and light color schemes give users a sense of healing and affinity, making them more inclined to drink water. Different capacities and structural designs meet users’ drinking habits and diverse usage scenarios. The stainless steel liner meets their needs for long-term heat retention and safe drinking water.