1 and PP are both environmentally friendly materials, but the disadvantage is poor high temperature resistance. PC has good temperature resistance and high strength. The fatal flaw of PC is that it contains the toxic substance bisphenol A, which has several side effects on the growth and development of babies. Therefore, at present, children's kettles all use environmentally-friendly plastics instead of PC.

2. As far as plastic material is concerned, if the current requirements are not high, PP material, PCTG can be used. PPSU is slightly better, with good high temperature resistance, high strength and environmental protection. It is an ideal material for water bottles, but its cost is relatively high.