When drinking water, have you seen the triangle with arrows at the bottom of the bottle?

A 12-year-old girl in UAE has cancer because she has been using the same mineral water bottle for sixteen consecutive months. The bottle contains a plastic material called PET, which is safe to use at one time. If you reuse it for thrift or convenience, there will be a cancer crisis.
The bottom of the mineral water bottle is a triangle with arrows,
There is a number in the triangle. General mineral water bottle, bottom mark 1; Nongfu Spring 4 litre pack, bottom mark 2; tea plastic cup, bottom mark 5.
1 In the arrow triangle
Pet Polyethylene Glycol
Common mineral water bottle and carbonated beverage bottle. Heat Resistant to 70 deg C deformation, there is harmful to the body of the Material Melt out. After using the No. 1 plastic product for 10 months, DEHP may be released. Do not soak in the sun in your car; do not hold alcohol, oil, and other substances.
2 In the arrow triangle
HDPE high density polyethylene
Common white medicine bottles, cleaning products, bath products. Do not use it as a water cup or as a storage container to hold other items. Clean thoroughly. Do not use it cyclically.
3 In the arrow triangle
PVC polyvinyl chloride
Common raincoats, building materials, plastic films, and plastic boxes. Plasticity is good, the price is cheap, so the use is very common, only heat-resistant 81 ℃. When high temperature is easy to produce bad substances, rarely used for food packaging. Difficult to clean and easily residual, do not use it cyclically. Do not buy a drink.
4 In the arrow triangle
PE polyethylene
Common cling film, plastic film, etc. Harmful substances are produced at high temperatures. When toxic substances enter the human body with food, they may cause breast cancer, neonatal congenital defects, and other diseases. Do not enter the preservative film in the microwave oven.
5 In the arrow triangle
PP Polypropylene
Common soy milk bottle, yogurt bottle, juice beverage bottle, microwave box
. Melting point up to 167 ℃, is the only plastic box that can be put into the microwave oven, can be used again after careful cleaning. Note that some microwave boxes and boxes are made of PP No. 5, but the lid is made of PE No. 1. Because PE cannot withstand high temperatures, it cannot be put together with the box in the microwave oven.
6 In the arrow triangle
PS Polystyrene
Pop-up box and snack box are common. Do not put it in the microwave oven to avoid chemical release due to high temperature. Acid (such as orange juice) and alkaline substances are decomposed into carcinogenic substances. Avoid using a snack box to pack hot food. Do not use a microwave oven to cook dishes for instant noodles.
7 In the arrow triangle
Other PC classes
Common kettle, space cup, bottle. Department Stores often use water cups of this material as gifts. It is easy to release a toxic substance, BPA, which is harmful to the human body. Do not heat the data during use. Do not directly bask in the sun.