PET plastic is polyethylene terephthalate, a clear, strong and lightweight plastic that carries recycling code 1. That is what PET stands for and what the meaning of the code on the bottom of the bottle is. It is the material behind most PET bottles on a South African shelf, from water and juice to cooldrinks, and it is the default whenever the customer needs to see the product inside.
This guide covers what PET plastic is, how it performs, where it beats the alternatives and where it does not, and what specifying it means in practice for a South African business. For how PET compares against HDPE and PP directly, see our guide comparing PET, HDPE and PP.
What PET plastic is
PET is a form of polyester, chemically related to the fibre used in clothing, produced by combining ethylene glycol and terephthalic acid. That combination gives it the glass-like clarity it is known for, along with strength and a low weight.
PET 1 plastic is the same thing. The number 1 recycling code is stamped on the underside of the container, and if you turn over a water bottle or a peanut butter jar and see it, you are holding PET. That code matters commercially as well as environmentally, because it determines which recycling stream the packaging enters and which producer responsibility organisation covers it.
Why PET became the default for bottles
Clarity is the headline property. PET is one of very few plastics with a genuinely clear, glass-like appearance, which is why it dominates categories where the product sells on how it looks. Juice, water, cooldrinks and many cosmetic products all rely on the customer seeing the colour and quality of what is inside.
Strength without weight follows close behind. PET is shatterproof, which makes it safer and cheaper to transport than glass, and lighter, which cuts freight costs on every load. For a business shipping from Gauteng to the Western Cape, that weight difference is a direct line on the invoice.
It is also non-reactive. PET does not readily interact with the majority of food, beverage and personal care formulations, which is why it is trusted across food, pharmaceutical and hygiene products. And it holds a strong barrier against oxygen and carbon dioxide, which protects shelf life and keeps carbonation in.
Where PET is the right choice
Specify PET when the product should be visible, when the contents are water-based or mildly acidic, and when the bottle will be handled normally rather than roughly. Beverages are the obvious case, but PET also suits sauces, oils, cosmetic lotions and serums, and many household products.
Clear PET bottles are the standard across juice bottles, water bottles and sauce bottles for exactly this reason. If your product is a drink or anything where colour is part of the appeal, PET is almost always the starting point. Where the contents are light sensitive, amber PET offers protection while keeping the fill level visible.
Size follows the serving occasion. Smaller formats such as 100ml and 250ml suit single serve, samples and concentrated products. 500ml is the retail workhorse across drinks and sauces. 1 litre and larger cover family packs and food service.
Where PET is the wrong choice
PET has real limits and it is worth knowing them before you commit to a run.
Heat is the main one. Standard PET softens above roughly 60 to 70 degrees and can deform, so it is not suited to hot filling unless you specify a heat-set grade. If your process involves warm or hot filling, PP is usually the better material and you should raise the fill temperature with your supplier before ordering.
Harsh chemicals are the second. PET handles water, most beverages and mild formulations well, but strong solvents, caustic cleaners and certain essential oils can degrade it over time. For aggressive contents, HDPE offers far broader chemical resistance.
Repeated flexing is the third. PET is rigid and strong under normal use but more brittle at the extremes, and it can stress crack if squeezed repeatedly. For a squeeze format that gets worked daily, HDPE or PP handle the fatigue better.
PET and rPET in South Africa
PET is among the most recycled plastics in the country. It is collected, sorted by colour, washed and reprocessed into flakes, which are then used to make new bottles, jars, textiles and other products. Sorting by colour matters, which is why natural or clear PET recycles more easily than heavily pigmented alternatives.
Recycled PET, known as rPET, is increasingly used in new containers. Specifying rPET where your product allows reduces reliance on virgin material and signals to customers that you are participating in the circular economy. Our Earthcare recycled range is built around this.
Two practical design choices affect whether your packaging actually gets recycled. Very dark colours are harder to sort and reprocess, so natural or light PET is the better environmental choice. And printing directly onto the bottle can make it less likely to be recycled locally, so a removable label is usually preferable.
What PET means for your compliance obligations
If you place PET packaging on the South African market, Extended Producer Responsibility applies to you. PET bottles and jars, together with their caps and labels, fall under PETCO as the producer responsibility organisation. Caps and labels are often made from polyolefins, which sit under Polyco.
This is a legal obligation on the producer, not on your packaging supplier, and it applies regardless of your size. Registering and meeting your EPR obligations should be part of your planning from the outset rather than something addressed later.
Specifying a PET bottle in practice
Once PET is the right material, three decisions remain. Size follows the serving occasion or usage rate. Shape affects shelf presence, labelling area and how efficiently the bottles pack onto a pallet. And the neck finish determines which closures fit, which is where most ordering errors happen.
The neck finish is described by two numbers such as 24/410 or 28/410. A closure only fits a matching neck finish, so confirm bottle and closure together before ordering either. Keeping the neck finish consistent across your range means one closure fits every size, which simplifies stock and filling.
Browse our full plastic bottles range to see the PET formats available, and contact the team to confirm a specification before committing to a full order.
Frequently asked questions
What is PET plastic?
PET stands for polyethylene terephthalate, a clear, strong and lightweight plastic carrying recycling code 1. It is a form of polyester made from ethylene glycol and terephthalic acid. PET is used for most water, juice and cooldrink bottles, as well as food jars and many cosmetic containers.
Is PET plastic safe for food and drink?
Yes, PET is widely used for food and beverage packaging and is non-reactive with most formulations. It does not readily interact with the contents, which is why it is trusted across food, pharmaceutical and personal care products. Confirm with your supplier that the specific material is suitable for food contact.
Can PET bottles hold hot liquids?
Standard PET is not suited to hot filling. It softens above roughly 60 to 70 degrees and can deform, unless you specify a heat-set grade. For processes involving warm or hot filling, polypropylene handles heat far better. Always confirm your fill temperature with your supplier before ordering.
How do I know if a bottle is PET?
Look for the number 1 recycling code, usually stamped on the underside of the container. PET is also recognisable by its clear, glass-like appearance and light weight. If you turn over a water bottle or a peanut butter jar and see a 1, the container is PET.
Is PET recyclable in South Africa?
Yes, PET is among the most recycled plastics in South Africa. It is collected, sorted by colour, washed and reprocessed into flakes used for new bottles, jars and textiles. Natural or clear PET recycles more easily than heavily pigmented bottles, so lighter colours are the better environmental choice.
Do I need to register with PETCO if I use PET bottles?
If you place PET packaging on the South African market, Extended Producer Responsibility obligations apply to you through PETCO. Caps and labels made from polyolefins fall under Polyco. This is a legal obligation on the producer rather than the packaging supplier, and it applies regardless of business size.
