What do the numbers on plastic bottles mean?

Mar 25, 2021

If you’ve come this far, it’s probably because you’ve wondered what’s behind the numbers on plastic bottles. We can say that these numbers are key to the correct recycling of plastic.

Are you still wondering what they mean? Well, let’s solve the mystery.

These numbers are commonly referred to as the “resin identification code” or “recycling number”. They are located on the bottom or side of the container and are responsible for classifying the type of plastic resin used in the production of the container.

Their existence is key to the correct classification of packaging for recycling, as each number is directly related to a type of plastic.

Do you want to know more?

Here we tell you what each number means and what type of plastic it is related to:

Number 1 – PET (Polyethylene terephthalate)
This is one of the most commonly used plastic materials in the manufacture of packaging. It is usually found in bottles containing liquids such as water or oil.

Number 2 – HDPE (High Density Polyethylene)
This is one of the most common plastic materials used in bottles containing shampoo, milk or detergent bottles.

Number 3 – PVC (Poviline Chloride)
This is one of the plastic materials with the best quality/price ratio, it is one of the most consumed plastics in Spain in long-lasting products. Toys are usually made with this type of plastic.

Number 4 – LDPE or LDPE (Low Density Polyethylene)
This type of plastic is frequently found in supermarket bags, bread and plastic wrapping.

Number 5 – PP or polypropylene
This is a very versatile and strong type of plastic. Polypropylene can be found in vehicle parts, industrial materials, textiles or as an insulator in electricity.

Number 6 – PS or polystyrene
We can find it in containers for packaged food.

Number 7 – Other
This numerology means that the plastic packaging has been manufactured with a different plastic resin and is likely to contain more than one plastic resin material.

Proper plastic waste management is key to comply with environmental regulations.

At the business level it is essential to move towards efficient and responsible waste management.

Remake it green