SHOCKING NEW STUDY:
Up To 92 TIMES MORE Microplastics Are Released At Coffee Brewing Temperatures
The Shocking Truth that researchers discovered about plastic and heat
If you’re a daily coffee drinker, you must see the results of this shocking new study.
Especially if you use a plastic drip coffee maker, plastic pods, or the plastic-lined paper cups they use at most cafés.
In 2020, researchers at Trinity College Dublin tested something simple:
What happens to plastic when you pour boiling hot water on it?
They filled plastic bottles with water at different temperatures. Then they counted the microplastics released.¹
Room temperature: 600,000 microplastics per liter
Boiling water: 55 million microplastics per liter
92 times more plastic.
Just from heat.
And the bottles they used? Made of polypropylene. The same type of plastic used in most coffee makers.
But if you drink coffee at a local café? You’re still not in the clear (even if they brew with zero plastic). Those paper cups they use are lined with plastic to stop them falling apart.
A separate study also tested these for microplastic release. When they come in contact with hot liquid? 25,000 microplastics are released in 15 minutes.² These aren't big chunks you can see. These are nanoparticles small enough to cross into places scientists thought were protected.
Where Scientists Are Finding Microplastics In The Human Body
When researchers started looking for these microplastics in human tissue, they started finding them everywhere.
- In testicles. Every single sample from a 2024 study.³
- In brains. Detected in human brain tissue, at higher concentrations than liver or kidney.⁴
- In placentas. Both the mother's side and the baby's side.⁵
- In newborns. The first stool babies pass after birth.⁶
Does presence mean harm? We need decades more research to really know.
But the early studies are leaving many scientists concerned.
A 2024 study in Toxicological Sciences found that higher plastic levels correlated with lower sperm counts.³
Another study:
People who died with dementia had 5 to 10 times more plastic in their brains than people without it.⁴
Does plastic cause these problems? We don't know yet.
But finding 5-10X more plastic in the brains of people with dementia? It seems crazy to just ignore that.
The Research Could Take Decades…
Your Coffee Maker Gets Used Tomorrow
Scientists studying microplastics don't make bold claims.
They say "needs more research" and "warrants investigation".
But while they will spend 20 to 30 more years investigating the health risks...
You're making a choice every single morning:
Keep heating plastic to 205°F... or don't.
And history shows us what happens when we wait for "definitive proof."
Cigarettes?
50 years to prove cancer. Doctors suspected it. People smoked anyway.
Lead paint?
40 years to confirm it harmed kids. Used in nurseries the whole time.
Asbestos?
30+ years from "seems fine" to "definitely causes cancer."
Millions exposed before the proof was ironclad.
We've been studying microplastics for a fraction of that time.
Already found in testicles, brains, placentas, newborns.
Does that prove harm? No.
But it proves they cross barriers designed to keep things out:
Your blood-brain barrier? Breached.
The placental barrier protecting babies? Breached.
The blood-testicular barrier? Breached.
Some people see that and think:
"Why keep brewing through plastic when glass is this easy?"
Your Coffee Maker:
Up To 730 Yearly Exposures You Can Easily Avoid
Microplastics are everywhere: water bottles, takeout, dust.
You can't avoid all of it.
But your coffee maker is different:
1- You use it every single day (365 times a year, often twice per day - that's 730 exposures)
2- It involves heat (remember that 92X increase?)
3- The fix is simple (just switch to glass)
"Coffee is now an experience! Such a mindful experience- and a morning ritual. A peaceful time to brew your coffee and contemplate your day. My coffee tastes so much better and no more filters! We are over the moon."
"No Paper, Metal or Plastic. Thank you Pureover for this amazing all-glass pour over coffee maker with no Paper filter, Metal or Plastic required. Thank you for designing this wonderful product. We use it literally everyday now!"
Most coffee makers have plastic everywhere:
❌ Plastic water tank heated to 195°F every morning.
❌ Plastic tubes hot water flows through.
❌ Plastic drip mechanism where coffee comes out.
Every brew. 730 times a year. Boiling water on plastic. And most people don't know there's already a zero-plastic solution.
It all started in a Portland workshop:
How a Portland Glass Artist Ran Out Of Paper Filters… Then Accidentally Fixed The "Microplastic Coffee" Problem
Etai Rahmil makes incredible glass art in Portland. But he's also an engineer.
One morning, he ran out of paper filters and didn't want to go to the store. So he grabbed a piece of glass from his workshop and tried making a brewer that could make coffee without filters.
Here's where it gets interesting though.
He didn't use normal glass. He used borosilicate glass. The same kind they use in laboratories because it's chemically unreactive.
And without knowing it… he accidentally solved the "microplastic coffee" problem.
Why Labs And Coffee Purists Are Using This Exact Type of Glass
Not plastic. Not metal. Not paper.
Borosilicate glass.
Here's why and how that affects your brew:
Can't leach anything
Nothing gets into your coffee
Heat stable
Doesn't break down like plastic when it gets hot
Non-reactive
Won't interact with coffee's acids or oils
It's why chemistry labs use this exact type of glass. And it's also why it produces the purest coffee you've ever tasted.
Pure Over's Signature Brew Kit uses borosilicate glass for the entire brew path. No plastic tank. No silicone seals. No metal that can oxidize. Just coffee and glass.
Which means you experience your coffee exactly as the roaster intended for it to taste.
All the oils, all the flavor, all the notes. With zero interference. Which is why coffee purists and pro baristas are switching.
A Plastic-Free Brewer That Could Actually Save You Money
The Signature Brew Kit costs $129 (one-time purchase, lasts for life).
Not cheap. But it pays for itself.
Let's do the math:
When you use the Signature Brew Kit, you're also not wondering if your "BPA-free" coffee maker is actually safe.
You're not throwing 730 plastic pods in the trash every year.
You're not buying filters that trap oils from your roast.
You're just making better coffee. Every day.
"This Is the Best Coffee I've Ever Made at Home"
"Pure Over makes the best tasting coffee I've had at home, ever. I've tried way too many other pour-over setups. This wins for taste. No contest. You should buy it because: 1) It's easier than regular pour-over, 2) It looks cool, 3) It just tastes better. That's the main reason."
"Before, all coffee tasted the same to me. Now? The smell hits you right away. The flavor is so fresh and clean. It's my morning thing I love doing every day."
"I've done pour-over for 10 years, but the rich flavors remind me of my French press days. I'm hooked."
"The new grinder helped, but it wasn't until Pure Over showed up that we were blown away. The coffee tastes SO PURE."
"After years with Pure Over, nothing beats how good you can make coffee taste with this. There is no contest."
Plastic-Free Café Quality Coffee In Just 4 Minutes:
Gravity and natural settling. Sounds fancy. It's dead simple.
Here's what happens:
STEP 1:
Ditch the paper and put your coffee directly into our glass dripper.
No scale needed! Our diffuser lid doubles as a measuring scoop.
✔️ Easy measuring. No extra tools needed.
STEP 2:
Add a splash of hot water and give it 45 seconds, that’s when the magic starts.
No gooseneck kettle needed! The diffuser lid evenly distributes the water for you.
✔️ Cleaner coffee with no paper filters
STEP 3:
Add the rest of your water, sit back, and let your coffee grounds do the work. It’s that easy.
✔️ Zero waste, zero hassle. Just great coffee!
The glass gives structure. The coffee does the filtering.
No paper soaking up oils. No plastic breaking down. No interference.
You're not filtering coffee through something else. The coffee filters itself through its own bed.
Result?
Zero waste. Zero microplastics. Zero hormone disruptors.
Just pure coffee exactly how it should taste.
What You Get:
The Complete All-Glass Brewing Kit
⭐ BEST VALUE + FREE GIFT
Ultimate
Brew Kit + 2 Mugs
✓ Everything in the Signature Brew Kit ($119)
✓ 2 all-glass Signature Mugs ($70)
✓ 2 ceramic mug coasters
✓ Everything in the Signature Brew Kit ($129)
✓ 2 all-glass Signature Mugs ($70)
✓ 2 ceramic mug coasters
FREE GIFT INCLUDED
🎁 Espresso Cup Set ($40)
Memorial Weekend Offer: 20% OFF + Gift
$239 $159.20 .Save $79.80.
Save $40
MOST POPULAR
Complete
Brew Kit + Coffee
✓ Everything in the Signature Brew Kit ($119)
✓ 1 all-glass Signature Mug ($35)
✓ 1 ceramic mug coaster
✓ Everything in the Signature Brew Kit ($129)
✓ Pure Over X Coffee Relief: Immersive Roast ($29)
FREE GIFT INCLUDED
🎁 Espresso Cup Set ($40)
Memorial Weekend Offer: 15% OFF + Gift
$198 $134.30 .Save $63.70.
STARTER
Starter
Signature Brew Kit
✓ Glass dripper with built-in glass filter
✓ Diffuser lid (spreads water evenly)
✓ Glass stir stick
✓ Ceramic storage base (black or white)
✓ 20oz glass carafe
✓ Ceramic carafe coaster
✓ 100% glass + ceramic. Zero plastic.
✓ Glass dripper with built-in glass filter
✓ Diffuser lid (spreads water evenly)
✓ Glass stir stick
✓ Ceramic storage base (black or white)
✓ 20oz glass carafe
✓ Ceramic carafe coaster
✓ 100% glass + ceramic. Zero plastic.
Memorial Weekend Offer: 15% OFF
$129 $109.65 .Save $19.35.
✅ Free shipping
✅ 30-day money-back guarantee
✅ 1-year warranty
✅ Dedicated customer support team
The 30-Day "Best Coffee Ever" Guarantee
Use it 30 days.
Not the best coffee you've made? Not confident about avoiding microplastics? Send it back.
Full refund. No questions asked.
"I love the Pure Over. I don't have to worry about plastic leaching anymore."
"I was worried about my plastic coffee maker. The plastic kept 'blooming' and I knew it was getting into my coffee. I found Pure Over and I'm so happy with it."
What You're Really Choosing
OPTION 1:
Keep heating plastic to 205°F every day, potentially exposing you to significant amounts of microplastics over time.
OPTION 2:
Use the same type of borosilicate glass commonly used in laboratories.
The choice is pretty simple.
And based on the feedback from 100,000+ people using Pure Over daily...
Once you taste coffee through pure glass (nothing absorbed, nothing added), you'll never go back.
Why 100,000+ Have Made The Switch:
✅ Lab-grade glass (same as pharmaceutical companies use)
✅ Zero plastic anywhere
✅ Nothing absorbs coffee oils
✅ Never buy filters again
✅ Handmade by glass artists
✅ 30-day risk-free guarantee
✅ Used by pro roasters for quality control
Designed in Portland. Crafted by Glass Artisans.
Which Means We Sell Out.
Each Pure Over piece begins in our Portland glass studio and is brought to life by skilled glass artisans.
Production happens in batches. Not on endless plastic assembly lines.
When this batch sells out? You wait weeks.
That’s what happens when people shape glass instead of machines stamping plastic.
Research Referenced:
1- Li, D., et al. "Microplastic release from the degradation of polypropylene feeding bottles during infant formula preparation." Nature Food, 2020. https://doi.org/10.1038/s43016-020-00171-y
2- Ranjan, V.P., et al. "Microplastics and other harmful substances released from disposable paper cups into hot water." Journal of Hazardous Materials, 2021. https://doi.org/10.1016/j.jhazmat.2020.124118
3- Hu, C.J., et al. "Microplastic presence in dog and human testis and its potential association with sperm count and weights of testis and epididymis." Toxicological Sciences, 2024. https://doi.org/10.1093/toxsci/kfae060
4- Nihart, A.J., et al. "Bioaccumulation of microplastics in decedent human brains." Nature Medicine, 2025. https://doi.org/10.1038/s41591-024-03453-1
5- Ragusa, A., et al. "Plasticenta: First evidence of microplastics in human placenta." Environment International, 2021. https://doi.org/10.1016/j.envint.2020.106274
6- Braun, T., et al. "Detection of Microplastic in Human Placenta and Meconium in a Clinical Setting." Pharmaceutics, 2021. https://doi.org/10.3390/pharmaceutics13070921
Disclosure
This is an advertisement. Information is based on published research and doesn't replace medical advice.
Results vary. Talk to your doctor about health concerns
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