1. Look at the material
The bottom of the regular plastic bottle has a triangle with an arrow, and there is a number in the triangle. The following numbers in the triangle at the bottom of the plastic bottle refer to the ingredients contained in the bottle and the effects of the ingredients on human health.
(1) PET polyethylene terephthalate
Commonly found in mineral water bottles, carbonated beverage bottles, etc. When the temperature reaches 70 ℃, it is easy to deform, and there are substances that are harmful to the human body. Plastic No. 1 may release carcinogen DEHP after 10 months of use. Such bottles cannot be placed in the car in the sun, and cannot be filled with alcohol, oil and other substances.
(2) HDPE high density polyethylene
Commonly found in white medicine bottles, cleaning supplies, bath products. Do not use it as a drinking glass, or as a storage container for other items.
(3) PVC polyvinyl chloride
Common in raincoats, building materials, plastic films, plastic boxes, etc. It has excellent plasticity and low price, so it is widely used. The heat resistance reaches its peak when it reaches 81 °C. It is easy to produce harmful substances at high temperature, and it is rarely used in food packaging. Difficult to clean, easy to remain, do not recycle.
(4) PE polyethylene
Commonly found in plastic wrap, plastic film, etc. At high temperature, harmful substances are produced. After the toxic substances enter the human body with food, it may cause diseases such as breast cancer and birth defects of newborns.
(5) PP polypropylene
Commonly found in soy milk bottles, yogurt bottles, and microwave lunch boxes, the melting point is as high as 167°C. It is a plastic product that can be placed in a microwave oven and can be reused after careful cleaning. It should be noted that for some microwave lunch boxes, the box body is made of No. 5 PP, but the lid is made of No. 1 PET. Since PET cannot withstand high temperatures, it cannot be put into the microwave oven together with the box body.
(6) PS polystyrene
Commonly found in bowls of instant noodle boxes and fast food boxes. Do not put it in the microwave oven, as it may release harmful chemicals due to high temperature. Avoid packing hot food in fast food boxes, and don't microwave instant noodles in bowls.
(7) Other types of PC
Commonly found in kettles, space cups, and feeding bottles. Department stores often use these glasses as gifts. However, water cups made of this material can easily release the toxic substance bisphenol A, which is harmful to the human body. Also, do not heat or expose to the sun when using this water bottle.
2. View
Whether the bottle wall is transparent and pure. Inferior plastic products are not washed cleanly and will be sticky and astringent.
3. Smell
Inferior products have a pungent odor, and even if they are filled with beverages or food, the odor can be smelled from the outside without opening the lid.
4. Look at the hardness
A good plastic container is thick and hard, and will not deform excessively when pressed inward by hand.
5. Look at the gloss
Good plastic containers have a glossy, soft surface, and poor quality ones are somewhat dull.
6. Tips for choosing a thermos cup
First pour lemon juice into the cup, let it stand for a few minutes, then pour out the lemon juice and wipe the inner wall of the cup. If the stainless steel cup surface has obvious marks, it is inferior; otherwise, it is of better quality.
