Numbers bottom the plastic on the of

The purpose of the number is to identify the type of plastic used for the Plastics with the recycling labels #1, #2 and #4 on the bottom are safer. You've probably noticed the numbers on the bottom of plastic items and wondered what they meant. They refer to the resin content of products. A raised number (1 -3,5,7) in a triangle on the bottom of most plastic containers tells you what type of plastic it is and if recycled properly what it can be turned. Have a closer look and you will notice a recycling symbol at the bottom, top or side of each plastic object. This recycle sign looks like a triangle.