Number 1: PET material, low heat temperature, mineral water bottles generally use this material, can not be reused, so the national standard bottled water can not use PET material;
Figures 2 and 4: High and low pressure polyethylene, safer, but heat-resistant temperature is low, can not be filled with hot water;
Number 3: PVC, one hundred percent contains a plasticizer, which is plasticizer, strongly discouraged, I remember a lot of cups as a child is this material, hot water taste very bad smell;
Number 5: PP, that is, polypropylene, it is recommended to use a lot of lunch boxes, baby bottles use this material, temperature 120 ℃;
Number 6: PS, polystyrene, a very brittle material, easy to crack, poor solvent resistance, high temperature easily decomposed benzene, not recommended;
Number 7: generally refers to the PC material, which is polycarbonate, the current domestic and international publicity easy precipitation of bisphenol A, but this material excellent transparency, excellent toughness, excellent high temperature resistance, personally think that baby bottles should not be used , But adult products such as the use of cups, GB has not made any relevant restrictions.