A triangular recycling symbol or Resin Identification Code made of three arrows with the number three in the middle and the word "PVC" under.

Plastic Number Three Symbol 

Plastic Bag With Fish

The number one preceded by a hash or number symbol, both outlined and tilted.

A handwritten symbol of a square root next to the number three as blackboard content for math class.

A folder with a number five symbol inside.

Three ridged plastic bottles with labels and lids.

The number 360 with the degrees symbol in a modern font.

A round icon with a plastic bottle symbol.