看电影分级制,但饮料瓶也有分级制,你知道么?秘密就在瓶底!把饮料瓶的瓶底翻过来,可以发现上面标有不同的数字,有些外面还会以三个箭头围绕的三角形。这个三个箭头组成的三角形代表可回收再生利用。而数字则代表不同材质。塑料瓶底部数字含义:1—代表PET(聚对苯二甲酸乙二醇酯):一般 Cinema rating system, but the beverage bottles are also hierarchical system, you know? Secret in the bottom of the bottle! Bottles of the bottle turned over, you can find the above marked with different numbers, some outside will be surrounded by three arrows triangle. The triangle formed by the three arrows represents recyclability. The numbers represent different materials. The bottom of the plastic bottle Digital meanings: 1-for PET (polyethylene terephthalate): General