Is there Plastic in my Tea?

Many of you will have heard that some teabags contain plastic. Consumer awareness is growing fast, following the 2017 BBC2 documentary ‘Inside the Factory’ and the situation has improved since then.

Most ‘pillow’ and ‘pyramid’ style teabags rely on polypropylene fibres embedded in the outer layer to heat-seal the edges shut. Millions of teabags are home composted or put into food waste schemes. They end up in the soil, where the microscopic plastic fibres accumulate and pose a risk to wildlife.

This environmental pollution may be invisible, but it is not insignificant. With 165 million cups of tea drunk in Britain each day, that’s a whole lot of microplastic on its way into our soil and water.

Key points

• Many tea bags contain plastic.
• The alternative, Polylactic Acid (PLA), can contain material from genetically modified sources.
• PLA teabags should go into council food waste, as they won’t break down in most home composting conditions.
• The best way to dispose of plastic tea bags is to rip them open and compost the leaves, but put the bag into the bin.
• Watch out for hidden plastics in sachets or string-and-tag bags.

What is microplastic?

Microplastics are tiny pieces of plastic, officially defined as any piece of plastic less than 5mm in size. There are two categories: 

• primary microplastics are up to 5mm in size when manufactured; 
• secondary microplastics are small pieces made from larger items degrading in the environment.

Research has found them turning up in all sorts of places, including seafood, salt, tap water and even in our bodies.

What are plastic-free teabags made from?

Many ‘plastic-free’ pyramid teabags are made using polylactic acid (PLA). This is a plant-based polymer (sometimes referred to as a bioplastic) which is biodegradable but not domestically compostable. It can also be called Soilon. Plant material sources include corn starch, which can come from genetically modified (GM) maize, which cannot be used in organic teabags.

Following consumer pressure in 2018 when 200,000 people signed 38 Degrees petition, PG Tips announced it was going ‘plastic-free’ for its pyramid bags, with the rest of its teabags following that.

PG Tips confirmed “Our biodegradable teabags are made from PLA which is a material derived from corn, grown in the US. Current US corn growing practices produce a mixed stream of GM and conventional (non-GM) corn. However, the processing and manufacturing process uses a high heat process, and no detectable GM material remains ... Longer term, we are working with our supplier on the development of biodegradable teabags from other sources that are non-GMO crops.”

Which teabags are plastic-free?

In the tables below you can see which companies sell loose leaf and whether their teabags are plastic-free, use PLA, or are still using some plastic. Some companies have made changes to their teabags quite recently. If you’ve got some old packets in your cupboard, check what the packet says.

(Information was taken from company websites, Facebook pages, or communication with the company in February and March 2022.)

NB This only covers the teabags themselves, not sachets they may be wrapped in, or wrapping on the box. It also only covers brands in our Tea and Herbal Tea guides.

What about organic teabags?

You may be thinking to yourself “I’m fine – I only buy organic teabags”. Don’t be fooled. The outer layer of a teabag counts as packaging, which can contain plastic and still be certified as organic. Sign the petition by The Green Shopper to ask the Soil Association to stop certifying plastic teabags. 

‘String and tag’ bags

The other main type of teabag is the ‘string-and-tag’ style, where the paper layer is folded at the top and secured using a stitch or staple. These bags are usually used for herbal teas or in catering.

Not all string-and-tag bags are plastic free: look out for crimping around the edges which shows the bag might have been heat-sealed, and therefore contain plastic or PLA. Furthermore, they often come in individual sachets, which can contain a hidden layer of plastic to keep the packet airtight. The string can be made from polyester or cotton.

String-and-tag bags that are free from plastic can be composted at home. If you want to be completely sure your teabag is plastic free, it’s best to check with the manufacturer directly.

What about loose leaf?

If you want to minimise the waste caused by your daily cuppa, loose leaf tea is by far the best option.

A metal in-cup infuser avoids the fuss of a pot and strainer. And lots of modern teapots have a built-in infuser, meaning that it’s easy to get the tea leaves into the compost and wash out the pot without clogging the sink.

Many high streets and markets have speciality tea merchants, where you can take your own container to be filled. These shops often have limited choice when it comes to fair trade and organic options but, luckily, there are a few plastic-free ethical loose-leaf options available to order online. Our guide to tea has more details.