REASONS TO BUY
Simple
Portable
Cheaper
Effective
REASONS TO AVOID
Not good for everyday use
Must prep water ahead of time
Kiinde Kozii Voyager Travel Warmer Review
While simple and effective, you can probably do this kind of warming with containers you already own
Credit: Abriah Wofford
RELATED: The Best Bottle Warmers
Our Verdict
The Kiinde Kozii Voyager Travel Warmer is a favorite bottle warmer for families on the go. It is a simple design package with multiple components that allow you to bring hot water with you for water bath warming later. It is inexpensive, easy to use, and easy to clean. However, it is limited in the number of times it can warm, the time between preparation, and when it will be used, and there are multiple components to keep track of. In our tests, it did heat consistently, but this assumes consistent preheating of water, and it requires a location that will allow you to prep and wait (so unlikely to be in your car). While it did an adequate job, we think you can DIY this process with things you already own, and we tested better portable options that offer more if travel or being away from home is a frequent occurrence.
Editor's Note: We tested the Voyager and other bottle warmers in March 2024, for our updated bottle warmer review.
Compare to Similar Products
 This Product
Kiinde Kozii Voyager Travel Warmer | |||||
|---|---|---|---|---|---|
| Awards |  Best Budget Bottle Warmer |  Best Overall Bottle Warmer | Most Consistent Bottle Warmer | ||
| Price | $22 List | $28 List | $60 List $59.99 at Amazon | $80 List $64.99 at Amazon | $22 List $19.75 at Amazon |
Overall Score  |
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| Star Rating | |||||
| Bottom Line | Simple and effective warming but requires prep work and could possibly be done with things you already own | The lower price, features, and multiple settings are appealing | A higher-price warmer that is easy to use and can heat consecutive bottles but it isn't very fast | A useful app and easy-to-use interface make this expensive warmer appealing | Cheaper warmer that is easy to use but doesn't heat consistently or enough |
| Rating Categories | Kiinde Kozii Voyage... | First Years Gentle... | Chicco Digital & St... | Baby Brezza Safe an... | The First Years 2-i... |
| Health and Safety (35%) | |||||
| Warming Quality (25%) | |||||
| Warming Time (20%) | |||||
| Ease of Use (15%) | |||||
| Ease of Cleaning (5%) | |||||
| Specs | Kiinde Kozii Voyage... | First Years Gentle... | Chicco Digital & St... | Baby Brezza Safe an... | The First Years 2-i... |
| Heat Technology | Water Bath | Water Bath | Water Bath + Steam | Water Bath + Steam | Water Bath + Steam |
| Max Temp | 117.2 °F | 88.4 °F | 92.2 °F | 105.9 °F | 108.7 °F |
| Frozen Capability | No | Yes | Yes | Yes | No |
| Baby Food Heating | No | Yes | Yes | Yes | Yes |
| Audible Beep | No | Yes | Yes | Yes | No |
| Measured Dimensions | 3.8 in x 3.8 in x 8.6 in | 5.2 in x 4.9 in x 10.3 in | 5.2 in x 5.1 in x 12.4 in | 6.0 in x 6.6 in x 11.8 in | 4.6 in x 6.2 in x 7.2 in |
| Contents Below 113ºF/45ºC | Yes | Yes | Yes | Yes | No |
| Time to Reach 80F | 5.0 min | 10.0 min | 8.5 min | 5.5 min | 5.0 min |
| Time to Reach 98F | 10.0 min | N/A | N/A | 9.5 min | 7.5 min |
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Our Analysis and Test Results
Two MIT engineers started the Kiindee company with the hope of improving bottle warmers and feeding babies. They create a system of components designed to meet each stage of nutrition from pump to pouch and pouch to storage to bottle and beyond.
Performance Comparison
Given the type of warming occurring with the Voyager and the time duration between heating the water and using it, it is unlikely you can damage the bottle contents' nutrients.
Credit: Abriah Wofford
Health and Safety
Because this unit doesn't have a heating element of any kind, it would be challenging to get the content of the bottle over 104 degrees when nutrition starts to degrade. However, depending on the starting temperature of the water you add to the insulated tumbler, your potential for burns still exists when making the initial transfer or when using the water later for warming. We recommend you take care when you set up your warming system for the day ahead.
For our tests of using it at the hottest setting, we boiled water, placed it in the insulated container, and then almost instantly poured it into the bottle-holding chamber. Because the water was recently boiling, the warming happened quickly, and the temperature of the bottle contents went up quickly past the 104F degree mark. At 4 minutes, it was over body temperature, and at 5-6 minutes, it was over 104F. However, it is important to note that it is highly unlikely you'd ever use this warmer in this manner. Because it is a travel warmer, you will likely fill the container in the morning and utilize it somewhere between 2-4 hours later when the internal water temperature will have dropped somewhat.
We tested the warming consistency of the Voyager Travel Warmer by tracking the internal content temperature over time.
Credit: Abriah Wofford
Warming Efficiency and Consistency
Because the Voyager differs from other warmers and doesn't heat water on its own, we tested it by filling the insulated container with boiling water and waiting 4 hours before using the water to warm bottle contents.
The Voyager requires pouring preheated water into a container with the bottle to create a water bath.
Credit: Abriah Wofford
If you use it before or after 4 hours, your experience will vary. The Voyager earned a slightly above average for the consistency of getting bottle contents to the same temperature. At 10 minutes, the range was 93-103 degrees. The range is smaller than some competitors and is suitable for bottle warming.
The Voyager has multiple parts that largely consist of a container for keeping water warm, a container to hold the bottle and hot water, and a lid.
Credit: Abriah Wofford
Quickness of Warming
This is really a basic water bath with preheated water, and as a result, it doesn't heat very quickly. However, it is not the slowest in the group, and this will largely depend on how hot the water is when you put it in the container and the time lapse between heating and using the water. If you heat the water at 4 am and use it at 3 pm, it will not get bottle contents as warm as quickly as if you use it at noon. In our tests, at 10 minutes, it averages body temperature across tests. It never got hot enough to be worrisome or could possibly degrade milk nutrition.
To prepare the Voyager you fill the main container with hot water and put the parts together for travel and use later on.
Credit: Abriah Wofford
Ease of Use
The product itself is pretty straightforward and is just an insulated container you fill with boiling water. Filling could lead to spilling, and we don't think you should be holding a baby when taking care of this warmer.
When you are ready to use it, you'll need both hands to unscrew the top, and once again, you are pouring hot water from one container to another. It is simple, with no settings to worry about, but you need to be careful with little ones nearby.
The Voyager Travel Warmer is easy to clean but does require a bottle brush to reach the bottom of the container.
Credit: Abriah Wofford
Ease of Cleaning
This unit is easy to clean with a bottle brush. The plastic components are dishwasher safe, but we'd just wash them all by hand in soapy water using a bottle brush. It does not require descaling or special sterilization.
Some of the Voyager parts can be cleaned in the top rack of the dishwasher.
Credit: Abriah Wofford
Should You Buy the Kiinde Kozii Voyager Travel Warmer?
The Voyager is really just an insulated container with extra components to hold your bottle and keep everything together. It feels like it could be useful for some, but if you're traveling, it needs to be used within about 4 hours, and you can likely only use it once. We also suspect most of you already have components at home that can be used to create a similar setup. Overall, we think there is a better portable option, and this one can be replicated DIY at home if you think you'd like this kind of setup.
What Other Bottle Warmer Should You Consider?
The Momcozy Portable Warmer is a unique and interesting portable warmer that we think could be the better travel choice for most. This warmer is battery-operated, can be used up to 4 times before needing a recharge, and is relatively consistent and easy to use. If you think you'll regularly need to warm bottles away from home, this would be our choice. It is smaller than the Voyager, too!
Manufacturer Video
—
Juliet Spurrier, MD and Wendy Schmitz
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