Identify plastic cups little common sense

we often use in everyday life and purchase some plastic products, have you ever found that actually use the properties of each product is different, here, give you a popularity of these small common sense, at the bottom of the plastic bottles to see inside the triangle number, 1 PET: heat resistant to 65 ℃, cold tolerance to - 20℃。 HDPE # 2: it is recommended that not to recycle. No. 3, PVC: * good don't buy. LDPE 4: heat resistance is not strong. PP: no. 5: microwave oven and tableware, crisper, resistance to high temperature 120 ℃. 6 PS: heat resistance and cold resistance, but not into the microwave oven. 7 PCS other classes: kettle, water bottle, bottle.