OutIn Nano Review: Real Espresso on a Hike? (7 Months of Testing)
★ The Verdict
The OutIn Nano is the best portable espresso maker for people who want real espresso without hand pumping. Battery powered, self-heating, real crema, $149.99. The compromises are single-shot capacity and a slower workflow. For travel and everyday life away from the kitchen, I haven't found anything better.
I’ve pulled shots in the car on a long drive, engine running, kids half asleep. On the commute. On a hike, halfway up, out of breath. At a work offsite with nothing but a folding table and no espresso machine in sight. At the park while the kids fought over the swings, nowhere near a coffee shop.
The OutIn Nano made all of those coffees happen. Seven months in, here’s the verdict: it’s the best portable espresso maker I’ve used, and I’m not switching back.
What it is
A battery-powered portable espresso maker. Fill it with water, add your coffee, press one button. It heats the water internally and pushes it through the grounds at 20 bars. Water hisses, the pump hums, and about 3 minutes later a real shot lands with crema on top.
No hand pumping. No stove. No compromise disguised as adventure gear.
OutIn Nano specs at a glance
| Price | $149.99 |
| Weight | 670g |
| Pressure | 20 bar, electric pump |
| Heat-up time | About 200 seconds from room temperature |
| Brew temperature | Up to 92°C / 198°F |
| Battery | 3 × 2500mAh lithium, USB-C |
| Shots per charge | 3-4 self-heated, far more with hot water |
| Stock basket | 6-8g, about 50ml, single shot |
| Optional Basket Plus | 16-18g, 60-80ml, double shot, about $40 |
| Takes | Ground coffee or Nespresso-style capsules |
What surprised me
I expected a gadget. I got a machine.
The crema is real. Not machine-thick, but genuinely there, holding for a few seconds before it breaks. The shot tastes like espresso, not like strong camp coffee wearing a costume.
The battery is honest. Three to four shots per USB-C charge when it heats the water itself. Add hot water from a kettle and it barely sips power.
The size works. It’s a large water bottle. It lives in my backpack next to a small jar of beans and my hand grinder. Sometimes I grind before I leave. When I need espresso and I don’t have time for any of that, I drop in a capsule.
That’s the good news. Here’s where it asks something of you.
What to know before buying
It’s a single shot. The basket it ships with holds 6 to 8 grams and pulls about 50ml. That’s a single, not a double. OutIn sells a bigger Basket Plus that takes 16 to 18 grams for roughly $40 more. I haven’t bought it. One shot has been enough for how I use this thing, but if you drink doubles at home, know that’s an extra purchase.
One at a time. Making espresso for two people means running it twice. Fine for me, worth knowing for you.
The workflow is slow by home standards. Three minutes of heating feels long when you’re used to a 3-second Bambino. On a trail, it feels like nothing.
Grind still matters. I use home roasted coffee from the SR800 and it makes great shots. In a rush, Nespresso capsules or an equivalent pod work too.
Charging takes about 3 hours. After three or four shots the battery is done. That sounds worse than it is. I’m not drinking more than three shots in a day anyway, so it charges overnight and I never think about it.
The real test: every weekend
This isn’t a once-a-year gadget for a big trip. It comes out on weekend hikes. It comes out at the beach. It comes out at the park while the kids play. It comes out on long car rides when nobody wants to stop for gas station coffee.
That’s the actual test. Not one perfect moment, but whether I reach for it every week. I do.
Bottom line
For home: buy a real machine. For everywhere else: the OutIn Nano.
What I actually bought was a shot of espresso in all the places I want one most and can never get one. Stuck in traffic. Halfway up a trail. On a beach chair at 8am. Standing at a playground while a four-year-old demands to be pushed higher.
That’s the whole thing. Where do you wish you had one?
Frequently Asked Questions
Does the OutIn Nano make real espresso?
Yes. It heats water internally and extracts under pressure with a 20 bar electric pump, producing a genuine shot with crema. It's not equal to a proper home machine, but it's real espresso, not strong coffee, and dramatically better than any hotel or trail alternative.
How many shots does the OutIn Nano pull on one charge?
Three to four shots per USB-C charge when it heats the water itself, using the standard 6-8g basket. Far more if you add pre-heated water, because heating is the main power draw.
Is the OutIn Nano a single or double shot?
Single. The basket that ships with it holds 6 to 8 grams and pulls about 50ml. OutIn sells a larger Basket Plus that holds 16 to 18 grams for a double, around $40 extra. I haven't used it. The single has been enough for me.
OutIn Nano vs Wacaco Picopresso: which is better?
Different tools, and I've only used the OutIn. The Picopresso is a manual hand pump device with no internal heater, so it needs a separate hot water source. The OutIn heats its own water and runs off one button. If you want fewer steps and no kettle, the OutIn is the easier call.
How long does the OutIn Nano take to make espresso?
About 3 minutes from cold water. It heats 50ml from room temperature to brewing temperature in roughly 200 seconds, then extracts. If you pour in water that's already hot, it's nearly instant.
Is the OutIn Nano worth it?
If you commute, travel, hike, or take your kids to the park where there's never any coffee, yes. At $149.99 it's not an impulse buy, but it pays for itself against coffee shop prices over time, and the morning quality-of-life difference is real.