Did you ever drink from a plastic bottle and see a triangle symbol on the bottom with a number inside?
Do you know what the number stands for?
Did you guess that it's just for recycling?
Then you are WRONG !!!!!!
THE NUMBER TELLS YOU THE CHEMICAL MAKE UP OF THE PLASTIC.....
1) Polyethylene terephalate (PET)
2) High density polyethylene (HDPE)
3) Unplasticised polyvinyl chloride (UPVC) or Plasticised polyvinyl chloride (PPVC)
4) Low density polyethylene LDPE
5) Polypropylene (PP)
6) Polystyrene (PS) or Expandable polystyrene (EPS)
7) Other, including nylon and acrylic