u/CoffeeTeaJournal

Keurig’s new Alta uses compressed coffee rounds with a plant-based coating instead of the usual plastic/aluminum pod.

That part is genuinely interesting.

What I’m more curious about is the machine itself. If someone is trying to reduce plastic around hot drinks, the pod is only one part of the equation.

What would matter more to you:

- the pod being plastic-free,
- the hot-water path being plastic-free,
- or just using a reusable brewer and avoiding the whole system?

I feel like “what actually touches the hot water?” is getting lost in a lot of the marketing around coffee machines.

What does Turkish coffee look like in your home this weekend?

Share your morning cup, your foam, a favourite cezve, or a cup with a story behind it. First attempts and imperfect brews are welcome too.

How to join:

• Create a photo post using the Showcase (Photo) flair.
• Use a photo you took yourself.
• Add a sentence about your coffee: how you made it, how it tasted, what coffee you used, or why you chose that cup.

You can start your title with “Weekend Cups” so other members can find your post.

New this week: We’re going to feature a few Weekend Cups posts in the Community Highlights at the top of the subreddit.

This isn’t an upvote contest. We may highlight posts with an interesting setup, a good photo, useful brewing details, a story behind the cup, or simply a conversation the community enjoyed.

No special equipment or perfect presentation needed. If you have a moment, visit someone else’s post and ask about their coffee too.

Cup-reading requests still belong in the weekly Fal Thursday thread. Weekend Cups is for sharing the coffee itself.

Coffee photos are welcome during the week as well, this is simply our weekend invitation to join in.

Why YSK: A lot of us start drinking coffee or tea before it has properly cooled because we’re in a rush. A large new study suggests that the temperature itself may matter, regardless of whether the drink is coffee or tea and letting it cool is a simple precaution.

The study analyzed two large UK cohorts totaling 977,282 adults, followed for an average of roughly 11 to 14 years. People who said they preferred their drinks “very hot” had about three times the relative risk of developing esophageal squamous cell carcinoma compared with people who preferred them warm. The researchers did not find the same association with esophageal adenocarcinoma, the other main subtype they examined.

The results were similar whether participants mainly drank tea or coffee. That supports the idea that temperature, rather than the specific drink, may be responsible. One proposed explanation is that repeated thermal injury to the lining of the esophagus could make the tissue more vulnerable over time.

The International Agency for Research on Cancer has also classified drinking very hot beverages, defined as above 65°C/149°F, as “probably carcinogenic to humans.”

To keep this in perspective, this was an observational study, so it found an association rather than proving that very hot drinks directly cause cancer. Participants reported their preferred temperature; researchers didn’t measure every drink. It’s also worth noting that “three times the risk” is a relative figure, which does not mean that everyone who drinks very hot beverages has a high absolute risk. Smoking and heavy alcohol consumption are also well-established major risk factors.

The practical takeaway is that you don’t need to carry a thermometer. If your drink is too hot to sip comfortably, give it more time to cool instead of repeatedly pushing through the discomfort. As a bonus, many people also find that coffee and tea flavors become easier to distinguish once the drink has cooled a little.

Sources:

[2026 study – International Journal of Cancer](https://onlinelibrary.wiley.com/doi/10.1002/ijc.70654)

[IARC assessment of coffee, maté and very hot beverages](https://www.iarc.who.int/news-events/iarc-monographs-evaluate-drinking-coffee-mate-and-very-hot-beverages/)

I've been thinking about this after seeing so many traditional hot sand setups. People often talk about sand-brewed Turkish coffee as if the sand itself somehow makes the coffee better. But obviously the coffee never touches the sand, the cezve does.

So I'm wondering if the real difference is simply how the cezve is heated.

On a stove, most of the heat is coming through the bottom. With hot sand, more of the cezve is surrounded by a heated medium, and the sand retains a lot of heat. My guess is that this creates a more gradual and forgiving heating profile. Which makes me wonder:

If you could get a similar heating curve on a stove or an electric brewer, would there actually be a noticeable difference in the cup?

I want to test this properly. I have an electric brewer designed around gradual heating, so I'm thinking of comparing it with a traditional sand setup using the same coffee, grind, ratio and cezve, while logging temperature over time.

For those of you who've brewed both ways, what differences do you actually notice? Foam? Brew time? Body or mouthfeel? Consistency? And if I run the experiment, what else would you measure besides the temperature curve and foam stability?

Why YSK: When buying a kettle, we usually look at the main body and stop there. But the part that actually matters for your drink is the water-contact path, every surface your water touches while heating and pouring.

A kettle can have a premium stainless-steel exterior while still using plastic or silicone components inside, such as:

- The underside of the lid

- Water-level windows

- Spout/filter frames

- Internal seals and joints

- Some sensor housings

That doesn't automatically mean those materials are unsafe. But if you're specifically trying to minimize plastic in contact with hot water, “stainless steel kettle” doesn't tell you enough. I've started asking a different question:

Instead of “Is this kettle stainless steel?” → “What exactly does the water touch?”

A useful way to check your own kettle is to inspect the lid underside, spout, filter and water-level window. A flashlight can reveal things that aren't obvious from the outside.

I was genuinely surprised when I checked an older kettle and realized that part of its water-contact path was plastic.

I’ve been driving myself crazy trying to dial in light roasts lately. I upgraded my grinder, bought some really nice beans, and tried basically every pouring technique on YouTube. But everything still came out tasting kind of dull, heavy, and just missing that sparkling acidity.

​Everyone always says "hard water is bad for coffee." I was using a standard Brita filter and assuming I was fine. But I finally started reading up on the actual chemistry this weekend and realized I was looking at the totally wrong numbers.

​Basically, calcium and magnesium (which make up water hardness) are actually the good guys. Magnesium is the MVP that extracts all those complex, fruity, and floral notes we pay so much money for.

​The actual villain is Bicarbonate (Alkalinity). It doesn’t extract flavor; it acts as a chemical buffer. If your tap water has high alkalinity, it literally neutralizes the natural chlorogenic acids in the coffee as it brews. It's basically like putting an antacid in your V60. You can have the perfect grind and puck prep, but those bright notes are chemically wiped out before you even take a sip.

​Standard pitcher filters don't remove dissolved minerals or alkalinity, they really just tackle chlorine. I looked up my city's annual water report and my alkalinity was sky-high. So I grabbed a gallon of distilled water from the store, mixed up a super basic mineral water (mostly just epsom salt for magnesium and a tiny pinch of baking soda for a small buffer) and brewed the exact same beans.

​The difference was insane. It was literally like a thick layer of fog lifted off the cup.

​Has anyone else gone through this? I feel like I've been wasting good beans for a year because I didn't know the difference between hardness and alkalinity.

​Why YSK: If you've ever given up on green tea because it tasted painfully bitter, try changing the water temperature before changing the tea.

​Green tea is pretty sensitive to brewing temperature. Hotter water extracts more of the compounds that contribute to bitterness and astringency, while brewing at a lower temperature can give you a noticeably smoother cup.

​L-theanine is one of the compounds associated with tea's savory/umami character, while catechins such as EGCG contribute to bitterness and astringency. Temperature affects how quickly and how much of these compounds end up in your cup.

​That's why boiling water can be a problem with some green teas. It doesn't "ruin" the leaves, but it can pull out more of the bitter and astringent compounds than you actually want.

​A good starting point is around 75–80°C (165–175°F). Studies on green tea have found that brewing temperature has a significant effect on both catechin extraction and sensory quality, with temperatures around 80–85°C often producing a more pleasant result.

​The lazy way to try it:

​No thermometer? Boil your water, pour it into your mug, and let it sit for a few minutes (around 3-5 mins depending on your mug) before adding the tea.

​Or just use a temperature-controlled kettle if you already have one.

​The difference can be surprisingly noticeable. Same tea, same mug, completely different cup.

​And if you normally brew green tea with boiling water and love it, keep doing it. Tea is supposed to taste good to you.

​Sources

​Vuong et al., Journal of Separation Science (2011), L-theanine extraction

​Vuong et al., Journal of Separation Science (2011) catechin extraction

​Rady et al., Food Chemistry, brewing temperature and sensory quality of green tea

I feel like Robusta gets a pretty unfair reputation in Turkish coffee. ​The usual reaction is something like: “It’s harsh, bitter, cheap, tastes like rubber…” ​And honestly, if the Robusta you’ve had was cheap commercial-grade stuff, I get it. ​But I don’t think that means Robusta itself is bad.

​A good Robusta can add a lot of body and weight to a cup. It can make a blend feel more intense and give it a different kind of bitterness. And depending on the coffee and how it’s prepared, it can also contribute to a denser-looking foam.

​I wouldn’t say Robusta automatically means more foam, though. Turkish coffee foam is affected by a lot of things, freshness, grind size, roast, coffee-to-water ratio, heat, and especially how you prepare it.

​You also don't need a huge amount of it. ​Something like 20–30% Robusta in an Arabica blend is enough to noticeably change the character of the cup. Not saying that's some magic “perfect ratio”,just a fun place to start experimenting.

​And this is the part I think gets overlooked: good Robusta actually exists.

​Fine Robusta is a real category, and producers like Sethuraman Estate in India have shown that Robusta can score very well when it’s grown, processed and roasted properly. There are also Fine Robusta producers in Vietnam.

​So maybe the question shouldn't be:

“Arabica or Robusta?”

​Maybe it's:

“Is this actually good Robusta?”

​I'd honestly take a well-made 70/30 blend over a bad 100% Arabica any day. ​Curious what people here think. Have you ever had a Robusta blend in Turkish coffee that you actually liked?

​Or does Robusta still ruin the cup for you?

When coffee enthusiasts say "instant coffee is bad," they are almost always describing spray-dried cheap grocery store instant (like Nescafé Original or Folgers). That stuff uses extreme heat to dehydrate the brewed coffee, which destroys almost all of the volatile aromatic compounds that make coffee actually taste good. I agree, that stuff is terrible.

But they completely ignore newer freeze-dried instant coffee. In freeze-drying, brewed coffee is quickly frozen, and the water is removed via a vacuum process without ever reaching a liquid phase. Because there is no high heat, the aromatic compounds are heavily preserved. Specialty brands like Swift Cup and Voila, or even mass-market options like Nescafé Gold or Davidoff, use this method. It is a chemically different, genuinely good product.

A good freeze-dried instant coffee is better than a carelessly made filter coffee, significantly better than 90% of airport or office drip coffee, and comparable to a decent café Americano.

It is not competing against a perfectly dialed-in V60 pour-over from a $500 home setup. But in the situations where people actually reach for instant (traveling, backpacking, a terrible office kitchen, or just being lazy at 7 AM), neither is anything else.

The snobbery among coffee drinkers is real, but their anger is directed at an outdated product. At its best, instant coffee is significantly better than its reputation, and most folks are dismissing it before they even know what they are criticizing.

We always talk about how sand is the ultimate way to make Turkish coffee here. (Though let's be honest, half the tourist spots in Istanbul serve gritty "gravel" sand coffee just for the visual show anyway). But I wanted to see if the "sand is magic" rule actually holds up in a proper blind tasting, or if we're just hypnotized by the aesthetics.

​I set up a blind test with four people using the exact same coffee, grind, 1:9 ratio, and water (~180 ppm). We ran three rounds each of a copper cezve on a gas stove (lowest flame), the same cezve in a sand heater (sand temp around 190–200°C), and a standard electric Turkish coffee maker (a mid-range one with a slow-heat feature).

​Here is the honest truth after tasting them blind:

​Yes, sand makes the absolute best foam. Because it acts as a massive thermal battery heating the cezve evenly from the sides, you get that thick, stable micro-foam. But honestly? It's wildly impractical for home. Taking 15-20 minutes just to preheat the sand for a single morning cup is a huge waste of energy and time.

​For actual flavor, if you have perfect technique on a gas stove, it tastes exactly the same as sand-brewed coffee. Our blind tasters couldn't tell the difference. The real advantage of sand isn't a magical flavor boost,it's just a heat-management safety net so you don't scorch the extraction. The stovetop has the same flavor ceiling, but the floor is much lower; if you look away for five seconds, the heat ruins the cup.

​And the electric machine? Because it has a slow-brew heat curve, it produced a pretty solid foam and a richer flavor than I anticipated. For pushing a button at 7 AM, it performed much better than I expected.

​I'm curious for your daily driver at home, have you found any tricks to mimic that even "sand-style" heat on a regular kitchen stove?