The use of plastic bottles is widespread in today's society. However, these plastic bottles are made of toxic materials which are poisoning us. For some reason you don't drink tap water and instead you buy or pour the one from the plastic packaging. Look at the triangle and the number printed in the middle. You may discover some shocking things. You are interested in the water composition but you ignore the chemical composition of the packaging. At the bottom of every packaging look for the triangle with the number in the middle and find out how dangerous is the plastic bottle you hold. 1 – PET (often PETE) These bottles in the majority are intended for single use. There is possibility that they that emit heavy metal antimony, a chemical substance EPA, which interferes with the action of hormones. Also they might be carcinogenic. 2 – HDP (sometimes HDPE) This is "good" plastic which has the lowest probability that will emit chemicals in the water. 3 – PVC (sometimes 3V) It emits two