BushLife - JetBoil Flash Java Kit Hero

JetBoil Flash Java Kit: Hot Water Under a 100 Seconds. Really?

JetBoil Flash Java Kit

4.8 out of 5
JetBoil Flash Java Kit

VERDICT: If you’re looking for a personal cooking system that is fast and efficient, the JetBoil Flash Java Kit is a great option. With a lightning-fast 100-second boiling time, this kit can make boiling water and keep it warm a breeze. Plus, the ultra-stowable Coffee Press and FluxRing cooking cup make French press coffee and cooking meals on the go easy and convenient. Read on for our full JetBoil Flash Java Kit review.

Weight: 13.1 oz / 371 g
Volume: 1 L
Power: 9,000 BTU/h, 2.6 kW
Boil Time: 100 sec/.5 L
Ignition: Push Button
Fuel Type: JetPower

5 out of 5
The JetBoil Java Kit is extremely lightweight, and what makes it ideal is all the components nest inside the FluxRing cup.
Ease of Use
5 out of 5
With a few twists, the whole system sets up and disassembles in seconds.
5 out of 5
Due to the ultra-fast boil, fuel consumption is less, saving you from buying canisters frequently.
5 out of 5
Achieves boil in 100 seconds or less when conditions are ideal.
4.1 out of 5
A simmer is very difficult to achieve. Having said that, this system is not meant for cooking but for making hot beverages or MREs quickly.




Compact Design

Boils Water Quickly




Coffee Press Included


Cannot Use Alternative Pots Without an Added Accessory

Performance Affected by Cold Weather

Cannot simmer

What avid outdoor enthusiast wouldn’t want a coffee or tea in 100 seconds? I know, I do! Enter the JetBoil Flash Java Kit. JetBoil claims that their stove can boil water in under 100 seconds, and we decided it was time to test their claim. By the end of this JetBoil Flash review, you’ll know whether or not the JetBoil Flash Java Kit is a must-have for your next outdoor excursion.

Discloure: Posts may contain affiliate links. Purchases made through our links result in a small commission to us at no charge to you. We only recommend products that meet our brand standards based on testing and first hand use by our authors.

What’s Does the JetBoil Flash Java Kit Include?

BushLife - Complete JetBoil Flash Java Kit
JetBoil Flash Java Kit Includes: FluxRing Cup, Coffee-Style Lid, Bowl, Stove, Stabilizer

Before we start with our JetBoil review, let’s see what comes in the box. In this Java Kit, you will find the following:

  • 1-litre FluxRing cooking cup
  • Silicone French coffee press
  • Stabilizer stand
  • Cup
  • Lid

What’s not included is the fuel, which is purchased separately. 

JetBoil Flash Java Kit Design and Features

Weighing only 13.1 oz, the JetBoil Flash is perfect for backcountry camping, backpacking, hunting, biking or paddling in the wilderness. Not only is it light, but the entire system nests, taking very little room in your pack.

The Java Kit has an awesome-looking 1-litre FluxRing cooking cup, which the French press kit nests perfectly inside, as does the stabilizer stand for your fuel. The protective cup doubles as a measuring cup or bowl, and the lid turns your cooking cup into a drinking thermos. This neat little system helps eliminate the need to carry additional gear and lessens the unnecessary pack weight.


The cooking system uses an isobutane and propane mix and has a convenient pushbutton igniter that starts the system instantly. It also features a stove that locks into the JetBoil FluxRing cup, keeping the system secured and stable. The 1-litre cooking cup features a colour-changing heat indicator and is scratch-resistant. As a bonus, the smaller 100g fuel canister fits nicely inside the cup

BushLife - JetBoil Flash Stove Valve
Valve Adjuster on the JetBoil Flash Stove
BushLife - JetBoil Flash Stove Pushbutton Igniter
Pushbutton Igniter on the Flash Stove


The JetBoil Flash Java Kit will have your water ready in 100 seconds, making it ideal for coffee, tea, hot chocolate, dehydrated meals and soups. Sold separately, the JetBoil Pot Support can be mounted to the gas canister for cooking fuller meals with a skillet or pot.

Further Reading: BioLite CampStove 2 Review: Is it Any Good?

JetBoil Flash Java Kit Ultra-Fast Boil System

BushLife - JetBoil FluxRing Cup Fill Line
Max Safe Fill Line on the FluxRing Cup

The Java JetBoil Flash is considered a personal cooking system featuring an ultra-fast boiling time. With a stopwatch in hand, the JetBoil did not disappoint. During some of our wilderness adventures, we have timed boils at 88 seconds, which seems dependent on the weather and surrounding environment. 

JetBoil recommends no more than 2 cups (16 ounces) of water for an ultra-fast boil. If adding more than 2 cups of water, the cooking system will boil the water at a reduced rate. By increasing the water volume, you risk splatter or spillover, which is not fun when admiring the impressive boil time. Because of the intense boil, the stove did vibrate but did not tip due to the provided stabilizer stand. If you’re wondering, the JetBoil boils enough water for one to two people.

What makes the JetBoil Flash boil water at such an impressive speed is the FluxRing technology that it uses. The technology used in the cooking cup ensures that the heat is evenly distributed and is efficient, resulting in less fuel consumption, making this a cost-effective kit. With decreased consumption, JetBoil minimizes its carbon footprint and makes it a sustainable solution for those who want to reduce their environmental impact.

Efficient Coffee Press

BushLife - JetBoil Flash Java Kit
JetBoil Flash Coffee Set Up

For those who love traditional coffee or tea, the JetBoil Flash Java Kit offers a convenient way to make these hot beverages on the go. The java kit includes a durable silicon French coffee press which filters out any grounds or leaves, leaving you with a smooth and flavorful cup of your favourite beverage. 

The silicon press fits tightly into the cup. However, on occasion, we found that some coffee grinds did slip through, and based on our findings, if the press is not perfectly squared when pushing down, some coffee grinds will get into your coffee.

BushLife - JetBoil Flash Coffee Grinds
Pouring Coffee Grinds into Boiling Water
BushLife - JetBoil French Press Fitting
French Press Fits Snuggly into FluxRing Cup

How To Assemble the French Coffee Press 

Assembly of the coffee press is quick and easy. Once you have gathered all the required pieces:

  • Screw the bottom stem into the top of the silicon coffee press
  • Take your top rod and insert it into the lid’s hole
  • Connect the two pieces
  • You now have an assembled French coffee press

How To Use the French Coffee Press

  • Add your coffee grinds or tea leaves
  • Pour in the hot water
  • Wait for the appropriate brewing time
  • Press down on the plunger and enjoy!

Convenient FluxRing Cooking Cup

BushLife - JetBoil Flash FluxRing Cooking Cup
Drinking out of the JetBoil FluxRing Cooking Cup

Part of the Flash Java Kit is a convenient 1-litre FluxRing Cooking Cup, which doubles as a thermos with its included coffee-style lid. You will find sewn into the neoprene cover of the cup is an easy-to-carry handle.

The FluxRing Cooking Cup is the heart of the Flash Java Kit, which is made from quality, scratch-resistant material. There is no worry about getting it damaged during transportation. The cup’s innovative design ensures even heat distribution for faster boiling and ultimate fuel efficiency.

The cooking cup also features a thermochromatic colour-change heat indicator, which aids in verifying water readiness. Its non-stick surface makes it easy to clean, making it essential when adventuring in the wilderness as nobody wants to carry their kitchen sink. 

BushLife - JetBoil Flash Heat Indicator
Seen on the FluxRing Cup is the Thermochromatic Colour-Change Heat Indicator

Pro Tip!

If spillage occurs during cooking, the cooking cup absorbs the hot water, which heats the neoprene cover. Be careful when removing the cup from the stove. Fortunately, the system cools down quickly.

Portability of the JetBoil Flash Java Kit

BushLife - Stowable JetBoil Flash Kit
JetBoil Flash Java Kit is Stow-able, Portable and Lightweight

As to portability, the JetBoil Flash Java Kit is hard to beat. At just 13.1 ounces, it’s incredibly lightweight and easy to carry. And thanks to its compact design, it takes up very little space in your backpack.

Disassembly is very quick and easy. The stabilizer stand folds into a neat little triangle that can nest into the cooking cup. There is room in the cup to store the disassembled coffee press and stove. Place the measuring cup onto the bottom of the cooking cup and pop the lid onto the top, and you now have a portable, compact system. How convenient is that!

How To Use the JetBoil Flash

Below is a short video of the JetBoil Flash Coffee Kit in use.

JetBoil Flash Java Kit FAQs

Fire Bans

The entire province of Ontario was under a fire ban recently in light of the recent forest fires. Several municipalities (including ours) are still imposing local fire bans, which poses a serious problem for those camping or in the backcountry who need to boil water for safe consumption or to cook a meal. 

Gas stoves are an exception during these fire bans and are permitted for use, which makes a stove such as the Java Flash a must for anyone intending to cook during one of these bans.

You will often find fire exceptions for cooking purposes – meaning certain areas (or times of day) are allotted for cooking purposes only, which generally applies to cities and is common knowledge. However, with a fire ban, this exception does NOT apply! Stoves such as the BioLite CampStove, which uses wood or pellets, are NOT permitted during a fire ban. Therefore, making the JetBoil that much more attractive.

Is It Worth Getting a JetBoil Flash Java Kit?

Investing in the JetBoil Flash Java Kit is a wise decision for anyone who loves outdoor activities. Its efficient design and rapid boiling time make it an excellent companion for all your adventures. Whether you’re going on a backpacking trip, kayaking on a river, or simply enjoying a day out in the wilderness, the JetBoil Flash Java Kit will provide you with a hot cup of coffee or a warm meal in no time. So, go ahead and get one for yourself today and experience the convenience and comfort of having a reliable stove by your side.

QUESTION: Have a JetBoil? How fast can you get yours to boil?

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Katherine Widziak
Katherine Widziak

Fuelled by the boundless energy of my two adventurous children, my diverse repertoire extends beyond the realms of an ordinary mother. As a seasoned graphic designer, master of social media content, and savvy marketing strategist, I've sculpted my own entrepreneurial journey. My passion for the great outdoors defines me - from igniting fires to setting up camps, my skills are diverse and practical. Skilled in ATV riding, possessing sharpshooting accuracy, and a knack for out-fishing just about any man - even my husband, though that's our little secret.

When not working away at something creative, you'll find me enjoying the outdoors in one form or another. Hopefully, I can inspire many women and men alike to pursue their outdoor goals and embark on new adventures.

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