We need to choose a suitable water bottle based on its intended use for children. From a functional perspective, there are thermos and regular water bottles available in the market for selection. Ordinary water bottles are often made of food grade materials and can be purchased and used immediately. A thermos cup is usually a water container made of double-layer stainless steel and a vacuum layer. The bottle mouth is tightly sealed with a sealing ring and an insulated bottle stopper, which delays the heat dissipation of the water inside and achieves the purpose of insulation. Its stainless steel liner material is divided into several types, commonly including 304 stainless steel, 316 stainless steel, and 316L stainless steel, all of which are very safe stainless steels, In terms of corrosion resistance and high temperature resistance, 316L>316>304. When choosing a thermos cup, we try to choose one with a silicone anti slip pad or a protective cover at the bottom of the cup, which can effectively avoid the injury caused by the water bottle falling from a high altitude.