Plastic tea bags release billions of microplastic particles into every cup you brew. A 2019 study by researchers at McGill University, published in Environmental Science & Technology, found that steeping a single plastic tea bag at brewing temperature (95 degrees Celsius) releases approximately 11.6 billion microplastics and 3.1 billion nanoplastics into a single cup of tea. The bags tested were made from nylon and polyethylene terephthalate (PET) -- the same materials used in the silky, pyramid-shaped tea bags sold by most premium brands. The safest alternatives are plastic-free bagged tea from brands like Traditional Medicinals (~$6 per box) and Yogi Tea (~$5 per box), or switching to loose leaf tea with a Forlife stainless steel infuser (~$15). Both options eliminate microplastic exposure entirely.
That 11.6 billion figure is not a typo. To put it in perspective, a single plastic tea bag releases roughly 16 times more microplastic particles than the number of people on Earth -- into one cup of tea. If you drink three cups a day, that is approximately 34.8 billion microplastic particles entering your body daily from tea alone.
Below, you will find the full research breakdown, a guide to identifying which tea bags contain plastic, reviews of four plastic-free alternatives with prices, and a simple plan for making the switch.
Our Top 4 Plastic-Free Tea Picks
What the McGill University Study Found
The 2019 study, led by Laura Hernandez and colleagues in the Department of Chemical Engineering at McGill University in Montreal, was published in the American Chemical Society journal Environmental Science & Technology. The researchers purchased four commercially available teas packaged in plastic tea bags, carefully removed the tea leaves, and then heated the empty bags in water at 95 degrees Celsius -- standard brewing temperature -- for five minutes.
Using electron microscopy and Nile Red staining to identify and count the particles, the researchers found that a single plastic tea bag released approximately 11.6 billion microplastic particles (larger than 1 micrometer) and 3.1 billion nanoplastic particles (smaller than 1 micrometer) into the water. The particles were confirmed to be nylon and PET -- the exact materials the tea bags were made from.
The particle levels from tea bags were orders of magnitude higher than those found in other foods and beverages. Previous studies on microplastics in table salt, beer, and tap water found particle counts in the range of thousands per serving. A single plastic tea bag releases billions. The difference is not incremental -- it is a completely different scale of exposure.
What kinds of tea bags contain plastic?
Not all tea bags are created equal. The ones that release billions of microplastics are the silky, translucent, pyramid-shaped bags that have become popular with premium tea brands. These bags are typically made from nylon (nylon 6 or nylon 6,6) or PET (polyethylene terephthalate) -- both thermoplastics that allow heat-sealing during manufacturing and give the bags their distinctive mesh appearance.
Traditional paper-style tea bags are a different story. Most are made primarily from natural fibers -- typically a blend of wood pulp and abaca (manila hemp). However, many conventional paper tea bags contain a thin layer of polypropylene as a heat-seal adhesive to close the bag. This polypropylene layer is usually a small percentage of the bag's total material, but it is still plastic, and it can still shed particles at brewing temperatures.
How to identify plastic tea bags
If the tea bag looks silky, shiny, or mesh-like, it is almost certainly made from nylon or PET plastic. If the bag feels papery but has a sealed edge (no staple or string tie), it may contain a polypropylene heat-seal layer. The safest options are bags that use staples, string ties, or are specifically marketed as plastic-free. When in doubt, check the brand's website -- companies that invest in plastic-free bags tend to advertise that fact prominently.
The biological impact
The McGill researchers also tested the effect of tea bag microplastics on water fleas (Daphnia magna), a standard organism used in toxicology studies. The water fleas exposed to tea bag particles showed dose-dependent behavioral and developmental effects, including anatomical abnormalities. While the concentrations used were higher than what a human would consume in a single cup, the researchers noted that cumulative, chronic exposure -- drinking multiple cups daily over years -- warrants further investigation.
A separate 2020 study published in Current Opinion in Food Science reviewed the broader evidence on microplastic ingestion and health, noting that microplastics can carry chemical additives (plasticizers, flame retardants, heavy metals) into the body. Nanoplastics are particularly concerning because their small size allows them to cross cell membranes and potentially enter the bloodstream and organs. Research on the long-term health effects of chronic nanoplastic ingestion is still in early stages, but the precautionary principle applies: when a safer alternative exists at the same price, the rational choice is to avoid the exposure entirely.
When the alternative to billions of plastic particles per cup is simply choosing a different brand of tea bag or using a stainless steel infuser, the decision is straightforward.
How common are plastic tea bags?
More common than most tea drinkers realize. Many major tea brands use plastic in their bags, either as the primary material (nylon/PET mesh bags) or as a heat-seal adhesive (polypropylene in paper bags). A 2019 survey by the BBC found that several well-known UK tea brands -- including PG Tips, Tetley, and Yorkshire Tea -- contained polypropylene in their standard bags, though many have since announced transitions to plant-based alternatives.
In the United States, premium and specialty teas are the most common offenders. The trend toward pyramid-shaped bags -- marketed as allowing better water flow and tea leaf expansion -- has pushed more brands toward nylon and PET construction. The irony is that these bags are positioned as the premium, quality option, when they are actually the most significant source of microplastic contamination in your cup.
The 4 Best Plastic-Free Tea Options (Detailed Reviews)
Each of these options eliminates the microplastic exposure that comes with plastic tea bags. They range from $5 to $15, and all of them are widely available. Whether you prefer the convenience of bagged tea or the ritual of loose leaf, there is a plastic-free option that fits your routine.
Traditional Medicinals Organic Tea
Traditional Medicinals has been making herbal teas since 1974 and is one of the few major brands that has never used plastic in their tea bags. Their bags are made from unbleached manila hemp (abaca fiber) with no plastic, no glue, and no epichlorohydrin -- a chemical sometimes used in paper bag manufacturing. The bags are heat-sealed using a crimping process rather than adhesive. Every tea in their line is organic, Fair Trade certified, and uses pharmacopoeial-grade herbs, meaning the plants meet the same quality standards used in herbal medicine. Available at Whole Foods, Target, Sprouts, Amazon, and most grocery stores.
Pros
- Zero plastic in any form
- Pharmacopoeial-grade herbs
- Organic and Fair Trade certified
- Wide variety of wellness blends
- Widely available at major retailers
Cons
- Slightly more expensive than conventional brands
- Herbal/wellness focus (fewer classic black/green options)
- Individual wrapping creates paper waste
Yogi Tea Organic
Yogi Tea uses plant-based fiber bags made from non-GMO materials with no polypropylene or other plastics. Their bags are designed to be compostable and are produced without chlorine bleaching. Yogi's range is broader than most health-focused brands, spanning Ayurvedic blends, classic green and black teas, and caffeine-free herbal options. Each box includes an inspirational quote on the tag -- a small touch, but one that speaks to their attention to the tea-drinking experience. Non-GMO Project Verified and USDA Organic across their organic line. Available at most grocery stores, Walmart, Target, and Amazon.
Pros
- No plastic in bags
- Affordable (~$0.31 per bag)
- Wide variety including black and green teas
- Compostable bags
- Available everywhere
Cons
- Not all varieties are organic
- Some blends contain natural flavors
- String and tag create slight extra waste
The Forlife Brew-in-Mug infuser is the most popular loose leaf tea infuser for good reason. It is made from 18/8 stainless steel with an extra-fine mesh that works with every type of tea -- including rooibos and finely cut herbs that slip through coarser infusers. The basket shape gives leaves room to expand fully, which extracts more flavor and antioxidants compared to ball-style infusers. It fits standard mugs and has a silicone-rimmed lid that doubles as a drip tray. Dishwasher-safe, rust-resistant, and built to last for years. Once you have one of these, your per-cup cost drops to the price of loose tea leaves alone -- typically 50-70% less than bagged tea. Available at Forlife, Amazon, and specialty tea shops.
Pros
- Zero waste, zero plastic per cup
- Extra-fine mesh works with all tea types
- Loose leaf = better flavor + cheaper per cup
- Dishwasher-safe, lasts for years
- Lid doubles as drip tray
Cons
- Requires access to loose leaf tea
- Slightly less convenient than grabbing a bag
- Needs rinsing after each use
Finum Brewing Basket
The Finum Brewing Basket is designed for larger vessels -- teapots, travel mugs, and oversized mugs. The wide basket shape gives tea leaves maximum room to unfurl and release their full flavor, which is why it is the preferred infuser for serious tea drinkers who brew by the pot. The stainless steel micro-mesh filter is fine enough for rooibos and CTC (cut-tear-curl) teas without letting particles through. The BPA-free plastic frame holds the basket in place on the rim of your teapot or mug. Simple, effective, and built to last. Available at Amazon, specialty tea retailers, and directly from Finum.
Pros
- Large capacity for full-pot brewing
- Fine enough for rooibos and CTC teas
- Stable rim grip (does not fall into pot)
- Affordable and widely available
- Dishwasher-safe
Cons
- Plastic frame (BPA-free, but still plastic)
- Too large for small teacups
- Frame can stain over time with dark teas
Head-to-Head Comparison
| Feature | Traditional Medicinals | Yogi | Forlife Infuser | Finum Basket | Plastic Tea Bag |
|---|---|---|---|---|---|
| Price | ~$0.38/cup | ~$0.31/cup | ~$15 (one-time) | ~$12 (one-time) | ~$0.25-0.50/cup |
| Plastic-free | Yes | Yes | Yes | Frame only | No |
| Microplastics | Zero | Zero | Zero | Zero | 11.6 billion/cup |
| Convenience | High (just steep) | High (just steep) | Medium (measure + rinse) | Medium (measure + rinse) | High |
| Flavor quality | Good | Good | Excellent | Excellent | Good |
| Cost per year (3 cups/day) | ~$416 | ~$339 | ~$110 + infuser | ~$110 + basket | ~$274-548 |
| Waste | Compostable bags + paper | Compostable bags + paper | Leaves only (compost) | Leaves only (compost) | Plastic + packaging |
| Best for | Convenience + safety | Value + variety | Best flavor + savings | Pot brewing | -- |
How to Choose the Right Option
If you want the easiest switch
Swap your current tea bags for Traditional Medicinals or Yogi Tea. The experience is identical -- open a bag, steep, drink. The only difference is that zero plastic enters your cup. Both brands are available at most grocery stores, so you can make this switch on your next shopping trip. No new equipment, no new routine.
If you want the best flavor and lowest cost
Switch to loose leaf tea with a Forlife infuser. Loose leaf tea produces significantly better flavor than bagged tea because the larger leaf pieces retain more essential oils and antioxidants. The initial cost is ~$15 for the infuser, and then loose leaf tea typically costs 50-70% less per cup than bagged tea. Over a year of daily drinking, the savings add up to hundreds of dollars -- while eliminating plastic exposure completely.
If you brew by the pot
The Finum Brewing Basket is designed for teapots and large mugs. Its wide basket shape gives leaves full room to expand, which matters more when you are brewing larger volumes. At ~$12, it is an inexpensive upgrade that lasts for years.
If you want both options
Keep a box of Traditional Medicinals or Yogi for convenience -- mornings when you are rushing, travel, the office. Use a Forlife or Finum infuser at home when you have a few extra minutes. This hybrid approach gives you the best of both worlds: zero plastic whether you are in a hurry or enjoying a slow cup.
The safest cup of tea is one where the only thing in your water is tea. Not nylon. Not PET. Not polypropylene. Just leaves.
Other Plastic-Free Tea Brands Worth Knowing
Beyond Traditional Medicinals and Yogi, several other brands have committed to plastic-free tea bags:
- Pukka Herbs (~$6 / 20 bags) -- Unbleached natural fiber bags stitched with organic cotton thread. Certified B Corporation, organic, Fair Trade. Known for Ayurvedic blends.
- Clipper Teas (~$5 / 20 bags) -- Unbleached, non-GM, plant-based bags sealed with a non-plastic adhesive. One of the first major brands to go fully plastic-free. Based in the UK, widely available in the US.
- Numi Organic Tea (~$7 / 18 bags) -- Filter paper bags with no plastic or chemical coatings. Organic and Fair Trade certified. Strong selection of green, black, and herbal teas.
- Rishi Tea (~$9 / 15 bags) -- Compostable sachets made from plant starch. Premium single-origin teas. Higher price point but exceptional quality.
A note on "biodegradable" plastic tea bags
Some brands are transitioning to PLA (polylactic acid) bags, marketed as plant-based or biodegradable. PLA is made from corn starch and is technically a bioplastic. However, PLA requires industrial composting conditions (high heat, specific microorganisms) to break down -- it does not decompose in home compost or landfill. More importantly, a 2021 study in the journal Food Chemistry found that PLA tea bags can still release microparticles at brewing temperatures. Until more research confirms the safety of PLA at 95 degrees Celsius, paper bags and stainless steel infusers remain the most conservative choices.
The Numbers: Daily, Monthly, Yearly Exposure
If you drink tea from plastic bags regularly, the cumulative exposure is striking. Here is what the McGill study numbers translate to over time:
- 1 cup per day: 11.6 billion microplastics + 3.1 billion nanoplastics = ~14.7 billion particles daily, ~5.4 trillion particles per year
- 2 cups per day: ~29.4 billion particles daily, ~10.7 trillion particles per year
- 3 cups per day: ~44.1 billion particles daily, ~16.1 trillion particles per year
These numbers represent plastic tea bags specifically -- the silky, pyramid-shaped nylon or PET bags. Paper bags with a polypropylene seal would release fewer particles, though exact figures for polypropylene tea bag seals have not been studied at the same level of detail. The safest approach is to eliminate the source entirely rather than try to quantify "acceptable" levels of microplastic ingestion.
Making the Switch (A Simple Plan)
Switching away from plastic tea bags is one of the simplest microplastic reductions you can make. Unlike replacing cookware or overhauling your kitchen, this swap costs under $15 and takes effect immediately.
Step 1: Check your current tea bags. Look at the bags you have at home. Are they silky, mesh-like, or pyramid-shaped? If so, they are nylon or PET plastic. Are they paper but sealed with no visible staple or string tie? They likely contain polypropylene. Check the brand's website if you are unsure.
Step 2: Finish what you have or recycle. There is no need to throw away perfectly good tea. Finish your current supply, then replace with plastic-free options on your next purchase.
Step 3: Pick your path. For the easiest switch, buy Traditional Medicinals or Yogi on your next grocery run. For the best long-term value, order a Forlife infuser and a bag of loose leaf tea. For both, keep bagged tea for convenience and an infuser for home.
Step 4: Make it permanent. Once you have found a plastic-free brand or infuser you like, it becomes your default. No ongoing effort, no recurring cost beyond the tea itself. The switch is a one-time decision that protects every cup you drink going forward.
The cost of switching
Traditional Medicinals and Yogi cost roughly the same as most conventional tea brands -- $5-6 per box. A Forlife infuser costs ~$15 and lasts for years. Loose leaf tea costs approximately $0.10-0.15 per cup versus $0.25-0.50 for bagged tea. Over a year, a loose leaf drinker saves $150-300 compared to buying premium bagged tea. The switch costs less, tastes better, and eliminates billions of microplastic particles per cup.
Frequently Asked Questions
Yes. A 2019 study by McGill University published in Environmental Science & Technology found that a single plastic tea bag steeped at 95 degrees Celsius releases approximately 11.6 billion microplastics and 3.1 billion nanoplastics into one cup of tea. The bags tested were made from nylon and PET, which are the materials used in silky, pyramid-shaped tea bags.
Traditional Medicinals uses unbleached manila hemp bags with no plastic or glue. Yogi Tea uses non-GMO plant-based fiber bags. Pukka Herbs uses unbleached natural fiber bags stitched with organic cotton. Clipper Teas uses unbleached, non-GM plant-based bags sealed without plastic. Numi Organic uses filter paper with no plastic coatings. All of these are widely available at major grocery stores.
Most pyramid-shaped tea bags are made from nylon or PET plastic. These are the silky, translucent bags that feel like a fine mesh. Some brands are transitioning to PLA (plant-based plastic), but PLA can still shed microparticles at brewing temperatures. Traditional paper-style bags from brands like Traditional Medicinals and Yogi are the safest bagged option.
Yes. Loose leaf tea eliminates the tea bag entirely, so there is zero microplastic exposure from packaging. You steep the leaves in a stainless steel or glass infuser, which are chemically inert. Loose leaf tea also tends to produce better flavor because the larger leaf pieces retain more essential oils. A stainless steel infuser like the Forlife Brew-in-Mug costs about $15 and lasts for years.
Most traditional paper tea bags are safer than plastic mesh bags. However, many contain a small amount of polypropylene as a heat-seal adhesive. Brands like Traditional Medicinals, Yogi, and Pukka specifically avoid polypropylene and use staples, string ties, or plant-based seals instead. If the paper bag has a sealed edge with no visible staple or tie, check the brand's website for confirmation.
The Forlife Brew-in-Mug Extra-Fine Tea Infuser (~$15) is the most popular choice. It is 18/8 stainless steel with an extra-fine mesh that works with all tea types, including rooibos. The Finum Brewing Basket (~$12) is best for teapots and larger mugs. The OXO Good Grips Twisting Tea Ball (~$10) is a compact option for single cups. All are plastic-free where it contacts your tea and dishwasher-safe.
Sources
- Hernandez, L.M. et al. "Plastic Teabags Release Billions of Microparticles and Nanoparticles into Tea." Environmental Science & Technology, 2019. DOI: 10.1021/acs.est.9b02540
- McGill University. "Plastic tea bags release billions of microscopic particles into tea." McGill Reporter
- Schwaferts, C. et al. "Methods for the analysis of submicrometer- and nanoplastic particles in the environment." TrAC Trends in Analytical Chemistry, 2019.
- Rubio, L. et al. "Biological effects, including oxidative stress and genotoxic damage, of polystyrene nanoparticles in different human cell lines." Current Opinion in Food Science, 2020.
- Busse, K. et al. "Release of microplastics from teabags: a review." Food Chemistry, 2021.
- Food Packaging Forum. "Plastic tea bags release billions of particles." Food Packaging Forum
- BBC News. "Microplastics: Premium teabags leak billions of particles - study." BBC
- Traditional Medicinals. "Our Tea Bags." Traditional Medicinals
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