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☕ Elevate your coffee ritual — from pod to grounds, every cup’s a masterpiece!
The Ninja PB051ST Stone Coffee Maker delivers versatile single-serve brewing with 7 cup sizes and 4 distinct brew styles, compatible with both K-Cup pods and fresh grounds. Its compact design features a removable 56-oz water reservoir and a built-in fold-away milk frother, enabling rich, café-quality drinks at home with precise temperature control and flavor extraction.

















| ASIN | B0DJFBF3SH |
| Best Sellers Rank | #1,078 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #5 in Single-Serve Brewers |
| Brand | Ninja |
| Brand Name | Ninja |
| Capacity | 56 fluid ounces |
| Coffee Input Type | Pods and Grounds |
| Coffee Maker Type | Drip Coffee Machine |
| Color | Standard-Stone |
| Compatible Coffee Pods | K-Cup |
| Customer Reviews | 4.3 out of 5 stars 11,925 Reviews |
| Filter Type | Reusable |
| Global Trade Identification Number | 10622356665596 |
| Human Interface Input | Buttons |
| Included Components | Coffee Maker, Built-in frother, Filter, Ninja Scoop, Ninja pod adapter, removable brew basket |
| Item Dimensions D x W x H | 13.07"D x 5.51"W x 13.31"H |
| Item Type Name | Pod & Grounds Specialty Single-Serve Coffee Maker, K-Cup Pod Compatible, Brews Grounds, Compact Design, Built-In Milk Frother, 56-oz. Reservoir, 6-oz. Cup to 24-oz. Mug Sizes, Stone |
| Item Weight | 6.2 pounds |
| Manufacturer | Ninja |
| Material | Metal, Plastic |
| Model Name | Ninja PB051ST |
| Model Number | PB051ST |
| Number of Items | 1 |
| Operation Mode | Fully Automatic |
| Other Special Features of the Product | Auto Shut-Off, Lightweight, Milk Frother |
| Part Number | PB051ST |
| Power Source | Electricity |
| Product Dimensions | 13.07"D x 5.51"W x 13.31"H |
| Special Feature | Auto Shut-Off, Lightweight, Milk Frother |
| Specific Uses For Product | Iced Coffee |
| Style | Modern |
| UPC | 622356665599 |
| Unit Count | 1 Count |
| Voltage | 120 volts |
| Warranty Description | 1 Year |
| Wattage | 1550 watts |
D**E
In Love!
I expected to like this Ninja coffee machine, but I didn't expect to love it as much as I do! I keep expecting it to do something to make me mad, but it just keeps on making me happy! I usually use a French press with freshly ground coffee, but I have health issues and I am on oxygen, making it difficult to do now. I wanted a simple but good coffee maker and I saw the great reviews for this baby. I've made everything with it except espresso. I love iced coffee in the afternoon and it makes a perfect glass of iced coffee for me. I could never buy a more perfect coffee at any coffee shop! It cleans up nicely. The milk frother is nice. I like that I can choose what size cup I want as well as choosing between classic or rich, to iced or espresso. I can use my freshly ground coffee or use pods. This baby does whatever you're in the mood for! Too bad they don't offer husbands this way! JK lol.. This little machine is just perfect for me and I highly recommend it to anyone!
A**N
I love this machine!!!
I have been loving this coffee maker! I have had a favorite coffee maker for years, and it suddenly died. I agonized over a replacement, because I liked that one so much and used it several times a day. It is still made, but the reviews reflected that it is not made for durability like it was when I bought it. I absolutely love this Ninja! I generally use coffee pods, so this is right up my alley. It is so quiet! It will make a variety of sizes for ups, mugs, travel mugs, and iced coffee. One of the features I look for is the ability to brew a strong cup from a pod. The “rich” function on this machine, does the trick! It doesn’t just run water straight through the pod, so that the flavor is lacking. It puts water through the pod in increments to get as much flavor as possible. I used the “over ice” function for the first time yesterday, and it also works slowly enough to pull as much flavor as it can. It was delicious! The brew time is really short, and yet the coffee tastes wonderful, and the temperature is perfectly hot. The machine and it’s components are very easy to clean. It takes up more space from front to back, but has very slim lines and looks good on the counter. The water tank is easy to remove, clean, and fill. I know a couple of people have mentioned having an issue with “exploding pods.” I had this happen ONE time, but I immediately realized why. When you put the pod in the machine, if you just pull the lid down, it may not fully puncture the bottom of the pod appropriately. This causes the hot water to overfill the pod, and it bursts from the pressure. There is a super simple fix!! All you have to do is place the pod in the machine, and press it down, so you feel it puncture the bottom of the pod. THEN close the lid to puncture the top! That’s it! Nothing difficult or time consuming. Just press the pod down before you close the lid. Problem solved! I haven’t had any issues since! 😊 I really am enjoying the ease of use and versatility of this machine. I think it is well made, and will be used for a long time. It is sturdy, without being bulky or heavy. The materials are sleek and easy to clean. I looked at dozens of coffee makers, and read SO many reviews before I made this purchase. The comments about the potential “exploding pods” had me a little concerned, but as I said, that won’t ever be a problem for me after realizing what can cause the issue. I’m an extremely picky person when it comes to my beloved coffee maker, and this Ninja has won me over!
A**T
Better than I Expected
Yes, I was surprised. This unit can make a good cup of coffee. The pod coffee is pod coffee. But the relatively large filter means you can put in more grounds. The shower-head dispersion of water and brew time can extract good stuff. It's hot enough. Storage of filters and scoop is great. The frother works, 'tho milk has to be heated elsewhere. Economical and small footprint. My first Ninja product.
C**S
Leaks
My last coffee maker was the keurig duo. After 3 years it started making noises and brewing the wrong cup suzes. I searched every coffee maker for a replacement and found this ninja. I loved everything about it especially the ground coffee basket. It has an attached frother on one side and slide in basket on the other side which holds the ground coffee basket. The ground coffee scoop attaches to the side. It was packed in the ninja box in another. Everything was wrapped separately. It took a lot more time unpacking it than it did to set it up. I followed all the instructions step by step. It was actually quite easy. I flushed the water thru as instructed. Afterwards I put in a peets kcup hit go. It brewed the coffee which was surprisingly too hot to take more than a tiny sip. I really liked this machine and it came in moss green. I left for an hour. When i came back my counter was flooded with water. I immediately thought it was from my old keurig and i hadn't noticed it. I noticed to water tank only had a little bit of water in it. It still didn't click until i refilled the water reservoir and put it back on. Slowly water started seeping from underneath the machine. The water in the reservoir had bubbles. I immediately took the reservoir off and put it on a dry paper towel to look for a crack. There wasn't one and the water wasn't bubbling off the machine. The water was still coming from under the machine because it was already in there. I thought check with Amazon online. I put in the info and the reply was i can get a refund. I didn't want a refund i wanted to exchange it. Nope have to return to kolhs not whole foods or Amazon fresh right below me. I decided to check the instruction sheet again. Ah troubleshooting. There's a section on leaks. The very last scenario is if leak is coming from under the machine call customer service. I call and was pleasantly surprice how easy it was to get to talk to a person. Kellie was very personable. I explained the leaking from under the machine. The impression i got from her was this isn't a common problem we did a video chat she looked at the machine i showed her where the water was coming from. There are 2 empty holes on the bottom. I showed her i can stick my pen up into them. The other holes like those have a screw in them. There are also non skid dots on the corners. She had me put the reservoir with water back on. It took maybe 30 seconds and i said bubblesare starting to form which she was able to see. Luckily i had the dry paper towel where it was as the water began seeping out for her to see in real-time. I told her i thought it was coming thru the holes i could stick my pen into. I was on the phone with her for 30 minutes. Yes they would send me a new machine but even if i cut off the cord the needed this one back. They won't pick it up. I would have to take it the FedEx. There isn't a FedEx anywhere near me. There are a few UPS but it can't go there. They can't send the new until they get they get the defective one. It would a few weeks to get the new one. I thought shark/ ninja would want to look over the machine to find the defect. Then i thought why did i bother and go thru all of this when i can return it to amazon and reorder it. I wasted at least 30 minutes on the phone with shark ninja and didn't get anywhere while water was still leaking from under machine. I thought i was a doing a good thing in case other people were having the same problem. After reading many of the good reviews i decided to read the bad. I'm not the only one with a leaking machine. I packed everything up and put the machine and all parts back into the box to return to amazon. I was going to reorder one even tho they were out of the green before i got to return this one. In 2 or 3 days the price went way up. Now they have 3 different models of this machine. The one i had with the frother was 99.00. I think it's now 30.00. I can do without the frother i only cared about the ground coffee basket. I've been using my french press because i don't have a machine. I'm debating if i should order the one without the frother or buy a new keurig that comes with a basket for grounds. I gave 2 stars because i like the streamlined look of this and there's a place for everything built into the machine and the actual basket for ground coffee not a kcup looking thing.
B**M
Very good K-cup machine. Should have purchased earlier
After years of owning Keurigs it was time for a change. Once a very good coffee maker, I had several years problems with Keurigs failing after a month or two of use. I would have to contact the company, go through trouble shooting, take pictures and return the thing to get a refurbished replacement. My last one made it seven months. Enter the new Ninja. The coffee is hot and actually brews the correct amount of coffee. It has worked everyday without a glitch. It is sleek with no water issues. Although plastic, as everything is, the unit is sturdy and takes up minimal counter space. I was hesitant to purchase the machine, as I had never owned a Ninja product and I am not a fan of a rear water container. I have adjusted to the location of the water, which is easy to remove and fill. I have not tried the frother yet, but expect it will work as well as the rest of the unit. Finally, a k-cup coffee maker that is not frustrating.
T**I
Absolutely nothing to complain about. Love from the first site
This coffee machine is so well thought out. I love that every single little part of it is integrated within the machine. So smart. It looks amazing. It works great. I've made teas, coffees, cappuccinos, I've used cups and grounds. I prefer grounds in general. The temperature of the drink is hot. Taste is awesome. There are 4 types of drinks you can brew. You can make classic(1) or rich(2) (the machine will stop a few times for a few moments and start brewing again during the cycle making coffee taste stronger/richer), over the ice(3) or specialty(4), which brews 4 oz and its really strong like expresso. I brew specialty when I'm making cappuccino. It brews very fast too. I love the frother. It works amazing. You don't get splashes because it has cover over it. I love that its always there and I can pop it out any moment when I need it. It's very easy to clean too. Quarter of twist detaches the frother and I can wash it quickly and pop it right back in with the same quarter of the twist. I absolutely love the fact that this is not overly complicated machine. It has basic functions that I wanted that all work really well. The machine is narrow and doesn't take much space on the counter which I really appreciate. It is a little taller than I thought it would be, but I guess my top kitchen cabinets is high enough that I don't have to move the machine and can open and close the lid with no problems. The heigh of the machine allows to fill the water tank with almost 48 oz of water. Water tank is easily removable. The height of the machine also allows for different types of cups. I can put a pretty tall thermos cup and brew straight into it. The most amount you can brew at once is 24 oz. The machine recognizes which attachment you have inside, for cups or grounds. Attachments are also marked on the outside on their little handles that stick on the outside of the machine when they stored away. It's so neat and cute. It's made with love. I'm soooo enjoying it and absolutely loving it. I'm planning to buy it as a gift to my loved ones, that's how much I love it. The permanent filter is easy to clean. It makes an amazing tea too, not just coffees. Loose leaf or a bag, everything comes out amazing and hot. The lid over the filter has a hole where the water flows through and has multiple holes on the bottom of the lid, just like shower head, which allows hot water to go evenly through the coffee grounds or tea leaves. Love that. I was looking for a single cup machine, so mostly I brew 1 or 2 cups only. I never had a problems with overflowing or getting grounds in the coffee. I think people get those problems because they simply put too much coffee grounds which causes it to overflow and get grounds into coffee. The included permanent filter is not huge, so if you need to brew strong coffee for a large amount of people at once, this is probably not the best choice. But if you brew 1 or 2 cups, this is perfect. Otherwise you could also brew a few times. I don't see any problem with that because it brews amazingly fast. I do not have any dripping problems either. I brew until the brewing cycle is complete, there is blinking light indicator on top of the lid. When brewing cycle is finished machine makes the light stops blinking and machine makes 3 beeps. Not loud, but I'm able to hear them with working TV, washer and dishwasher. If you remove the cup after those 3 beeps and wipe (i usually just touch it with edge of my cup) the last drop on the spout it doesn't drip. Ever. But even if it was to drip a couple drops, there is a nice really easy to clean dripping tray, that you can place on 4 different heights or remove completely. I think this machine is worth every penny. I can't tell you enough how much I love this thing. I'm so glad I chose to buy it. I didn't even expect it would be so great. Not big or bulky, well thought out, looks very very nice, has all nessesary functions that each works amazing. It doen't look cheap at all. It's very pleasing to the eye and stylish. I would highly recommend it to anyone who wants versatility, simplicity and style. I feel like I didn't say enough, didn't give it enough credit for what it is lol. Whoever was designing this thing is for sure a big people lover. I wanna give them a hug hahaha.
C**O
Quick, Easy, and Consistently Good Coffee Every Morning
Here’s a solid, helpful review you can use or tweak: ⸻ I’ve been using my single-serve Ninja coffee maker daily, and overall it’s been a really reliable part of my routine. It heats up quickly and brews a cup fast, which is perfect when I’m rushing in the morning or heading out for a long shift. I like that I can choose different brew sizes without wasting coffee, and it consistently comes out hot and smooth. The flavor is better than I expected from a single-serve machine—no weird aftertaste, and it handles both regular grounds and stronger brews pretty well depending on how I set it. It’s also pretty easy to clean, which is a big win for me since I don’t want extra chores first thing in the morning. The only downsides are that it can be a little noisy while brewing, and the water reservoir isn’t huge, so I end up refilling it more often than I’d like. But honestly, that’s minor compared to the convenience. Overall, it’s a great compact coffee maker that does exactly what it’s supposed to do—quick, consistent coffee without any hassle. Would definitely recommend it for anyone who wants something simple but dependable.
D**K
Excellent Coffee Maker for Strong Coffee
When my name brand (not K) coffee maker went to the big coffee bean in the sky, I decided that $200 was a bit pricy for something that lasted only 4 years. For the most part, I grind beans and use the filter. We don't drink a lot of coffee and I like being able to customize each cup. So I went on a search for the ideal single serve coffee brewer. After trying 2 other brewers, each with problems, I decided to give Ninja the old college try. Boy, am I glad I did. My husband for the most part, drinks a regular cup of coffee with cream and sugar. I make a hot latte every day. I have a really good moka pot, but I wanted a machine capable of making a really strong cup of coffee, which doesn't seem to exist in the majority of name brands. I gave up on the big K a long time ago. I don't use the frother. Maybe one day I will. What caught my immediate attention is the large (and I mean LARGE) filter coffee holder. It holds at least 1/2 cup of coffee! It's ginormous. I use 3 scoops to 12oz water, set on "rich" for my latte, mixed with 8oz hot milk. At first I thought I did something wrong, or that it was defective. A little water came out, and it stopped. On try #3, I decided to let it sit. Sure enough, after a minute or so, it continued. (Perhaps I should have looked at the instructions first?). Lol. What it was doing was allowing the water to soak into the grounds, to extract the coffee. This is the first time in our almost 40 years of marriage, that my husband said his coffee was too strong (and he lived in Germany for 20 years). The maker automatically detects whether you have inserted the filter or kcup. The display is intuitive and easy to program. It remembers your last setting. The brewer is Ninja quality. I've owned several Ninja appliances over the years, all still going strong. If you want a regular cup of coffee, Ninja will provide. If you want a truly strong cup of coffee, Ninja will give it to you. If anyone thinks it doesn't brew a strong cup, they're either not using enough coffee, they're using the wrong blend, or they haven't tried using the filter. Also, all accessories are stored onboard. There's a nifty drawer on the right side that stores the filter or kcup holder, while your using the other. It's a very well thought out machine. The price is very reasonable.
P**A
Muy bonita
La compre para mi casa. Llego rápido y en buenas condiciones. Muy bonita y funcional. No ocupa mucho espacio
A**R
The machine is lovely but in Britain beware.
The coffee machine is very good but beware in Britain the voltage for the machine is 120 volts and in Britain we are 240 volt. To return the machine is very costly, the cost of sending mine back was around £60. Amazon don't want to know about returning the machine, they just send you a label to print off and that's it. I can't understand why Amazon sell items on the market place that don't comply with British voltage.
R**Z
¡La amo!
Es una excelente opción a bajo costo comparado con otros productos que ofrecen menos diversidad de preparaciones. Es súper fácil de usar. Ocupa muy poco espacio y realmente considero que es un plus que acepte grano molido. OJO: Si eres de México no es “tan fácil” encontrar las cápsulas con las que trabaja (a diferencia de las Nespresso que venden en todos lados), pero Amazon resuelve ✅
B**O
Cafeteria
Un diseño muy bonito
C**N
Best coffee machine
Great machine so glad. Looks and works great
Trustpilot
2 weeks ago
1 month ago