This machine is the only way to make nitro cold brew coffee at home – and it’s on sale


Cumulus Coffee machine

Alison DeNisco Rayome/ZDNET

Cold brew fans know the process for making this type of coffee is completely different from hot coffee, and can be time-consuming to do at home. But the Cumulus cold brew coffee machine is designed to make only single-cup cold brew, nitro, and cold espresso in a process as easy as using a Keurig — and it’s the only way to make nitro cold brew at home.

The machine usually comes at a high price point of $695. But ahead of Mother’s Day, it’s 15% off with code MOTHERSDAY15, making it a great time to buy if you’re in the market for a high-end at-home cold brew machine.

Also: 5 kitchen tech splurges are totally worth it

I tried out the Cumulus cold brew machine at home, and was impressed by the design — it’s tall, but has a slim, stylish profile, and is extremely simple to use. You pop a proprietary pod filled with coffee concentrate into the cylinder at the top, and select from three options: still cold brew, nitro cold brew, or cold espresso. When you first add water to the machine, it takes about 15 minutes to cool it down. After that cooling period, it brews in about a minute, so if you fill it up before you go to bed at night, it’ll be ready for you to instantly brew when you’re ready for coffee. 

Also: This fancy automatic espresso machine made me drop my Dunkin’ habit

The nitro coffee option was the biggest standout: The machine infuses nitrogen gas into the cold brew coffee, which gives it a thick, smooth texture and foamy head — pretty much impossible to achieve at home any other way, and better than store-bought cans.

Cumulus Coffee machine

Alison DeNisco Rayome/ZDNET

The biggest downsides are the price, and needing to buy pods directly from Cumulus. I found the coffee to be extremely strong as well, so this won’t be replacing my De’Longhi Rivelia for everyday use (though they are very different machines with different purposes). But if you’re someone who frequently purchases a strong cold brew from a coffee shop, this could help cut down your costs over time.

If you’re in the market for a cold brew coffee machine, consider this deal for 15% off the Cumulus.

Also: This automatic espresso machine is like having my own barista, and it’s not by De’Longhi or Breville

How I rated this deal 

At 15% off, this deal gets a 3/5 editor’s rating — it isn’t the biggest discount, but for an expensive machine that rarely goes on sale, it’s still a solid one.

This deal expires on May 1, 2026.

Deals are subject to sell out or expire any time, though ZDNET remains committed to finding, sharing, and updating the best product deals for you to score the best savings. Our team of experts regularly checks in on the deals we share to ensure they are still live and obtainable. We’re sorry if you’ve missed out on this deal, but don’t fret — we’re constantly finding new chances to save and sharing them with you at ZDNET.com


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Recent Reviews


As an ardent, perhaps obsessive, Harry Potter fan, I can’t say I was thrilled when I learned HBO was rebooting the beloved film franchise as a TV show. 

Like millions of other Harry Potter enthusiasts, the books and movies have been a key part of both my adolescence and adulthood, offering a magical refuge from a not-so-dazzling Muggle world. Theme parks, Broadway shows, mega stores and audiobooks have kept the spellbinding story alive not just for my generation, but for younger Potterheads as well. 

But I never thought we’d get an on-screen retelling just a decade and a half after the films wrapped up. What was the point of doing it all again with a brand-new cast, beyond the obvious monetary gain?

Hollywood is stuck in a loop of recycling successful TV shows and movies to make an easy buck. I thought Harry Potter was safe from that phenomenon, at least for a while, given the ongoing relevance of the films. Over the years, I’ve gone to multiple Harry Potter screenings with audiences of all ages, highlighting the franchise’s broad cultural appeal across generations. Surely, there was still room for future generations to take part in something that’s brought us so much joy. 

Despite controversy surrounding author JK Rowling’s views on transgender issues, which run counter to the series’ themes of love, inclusivity and justice, Harry Potter remains a meaningful part of many fans’ lives. Its stories, characters and themes continue to resonate, fostering a sense of connection and belonging for those who have adopted the wizarding world as their own. 

Now, the enchantment of the original films would be supplanted by a shiny new TV franchise. A world that had come to life so vibrantly on screen would be repurposed before the magic had run out. I wasn’t on board with the idea at all.

But recently, something changed. 

As more details began to emerge about the upcoming TV series, I felt myself softening toward the endeavor. Starting later this year, the episodes will be released on HBO and HBO Max over a decade, with each season focusing on one of the seven books for a more in-depth telling of the story than the film adaptations. As much as I love the movies, having more time to delve into side stories and details that didn’t make it on screen the first time doesn’t sound like such a bad idea. 

When HBO dropped the first trailer for Harry Potter and the Philosopher’s Stone this week, I felt a mixture of trepidation and curiosity. Just how familiar — or not — would this reimagined world feel? As I hit play, those feelings quickly gave way to an unexpected excitement. 

In the trailer, we glimpse the loneliness of Harry’s upbringing as he’s tossed in the cupboard under the stairs, reprimanded by his aunt and bullied by his cousin. We hear him lament how little he knew his parents. We see him take in the splendor of Hogwarts with wonder. We watch him light up as he finds joy with new friends. 

The actors playing the golden trio of Harry (Dominic McLaughlin), Ron (Alastair Stout) and Hermione (Arabella Stanton) appear well-suited for their roles, even in the brief glimpses we get of them navigating this enigmatic and enchanting world.

The iconic lightning bolt scar, the calligraphic acceptance letter, the homey Hogwarts Express — it’s all so familiar and yet entirely new. Despite my earlier hesitation, it’s thrilling to be part of this second wave of magic — even if I still see the show as a clear attempt to further profit from a successful franchise. But rather than viewing the TV series as a departure or replacement of the beloved movies, I’m choosing to see it as another way to keep the wizarding world alive through a fresh lens.

If the train is leaving the station, I might as well hop aboard and enjoy the ride. When Harry Potter and the Philosopher’s Stone debuts in December, I’ll be watching, Butterbeer in hand. As Hagrid wisely put it, “What’s comin’ will come, an’ we’ll meet it when it does.”





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