last logged in on March 25, 2020 12:43 am

Warming Efficiency The Kozii earned an of in warming efficiency. Depending on the bottle material, quantity and starting temperature of milk, it could take anywhere between to over 1minutes to warm milk via its gentle circulating warm water bath. It will take a short initial trial period to find the right setting for your particular needs. So, be patient. The extra time is well worth it to preserve breast milk nutrients. Keep in mind, frozen will take longer! Frozen storage bags of breast milk may take upwards of 1minutes. For this situation, Kiinde recommends warming a frozen bag for minutes, then pushing the frozen milk to bottom of bag and continue warming. However, once that sweet spot is found, the Kozii executes warming consistently. In our testing, at recommended settings, it took ounces of refrigerated milk in a small Lifefactory Glass Bottle with silicone sleeve 5:50 to reach 80F and at maximum setting, 6:00 to reach the same temperature. Always make sure the Kozii has sufficient water prior to running. In the event that the Kozii is run dry, its safety thermostat may trip which will mean that its water bath will not be heated. In this event, you need to re-set the system following the troubleshooting instructions. However, do not make this a habit as the entire system will stop working permanently if it is tripped more than times. A cheap steam warmer The First Years Simple Serve (formerly called the Quick Serve) is the fastest and cheapest warmer we tested, but you have to add an exact amount of water for each use, bottle parts come out hot, and it can’t thaw frozen breast milk. Chicco NaturalFit Digital We paid attention to how difficult it was to figure out the cycle settings. Some warmers only require you to turn the machine on, or select a bottle size, shape, material, and starting temperature, and then use thermostats to determine when to shut it off. Other machines require you to choose a time setting based on your own analysis of those factors, making it easier to miscalculate. Some machines require measuring a specific quantity of water rather than just filling up the reservoir, which also added complexity. Based on these tests, we were able to narrow the field to two top warmers, which we then tested by heating bottles of breast milk (we had used formula up to this point). We first defrosted frozen bags of breast milk in the warmers, noting if they melted evenly and if portions of the milk overheated. We then heated 4-ounce bottles of refrigerated breast milk in each machine to determine if there were any differences in how breast milk heated versus formula. We found that breast milk bottles heated at similar speeds to formula bottles. Flaws but not dealbreakers Despite its claims, the Kiinde Kozii can overheat formula and breast milk. To be fair, this is true of all the warmers we tested (except for the very low temperature, and too slow Avent warmer). Because the Kozii uses relatively cool 140 °F water—the steam warmers heat to 21°F—the bottle will never get hotter than 140 °F. That’s way too hot to serve to a baby, of course, and it’s a temperature that may change or damage properties of breast milk, but it’s not as hot and potentially hazardous as those produced by some of the other warmers we tested. Though the Kozii’s kitchen-timer-style dial is easy to use (you simply turn it to the time setting you want, such as between and for 5½ minutes), because it’s so small, it’s easy to accidentally set it slightly shorter or longer than you mean to. The Kozii claims it can defrost bags of frozen breast milk, but we don’t recommend it in the Kozii or any other warmer. When we tested this, it took about minutes to fully defrost and warm a 4-ounce bag. But we found the temperature of the milk was very uneven during melting and warming; some portions of the milk reached over 120 °F while the rest remained frozen. If you’re concerned about not exposing breast milk to high temperatures, defrost it in the refrigerator or in a bowl of hot water. Some people may find the loud ticking of the Kozii’s timer, which sounds like a typical kitchen timer, annoying. And, frustratingly, the Kozii doesn’t have a ding, beep, or other alarm to let you know the cycle has ended—the end of the ticking is your signal. The company told us it hasn’t included a beep or other signal because most people find the ticking itself to be sufficient, and some people use the warmer near a sleeping baby. We would prefer an optional alert. You might be surprised how much cleaning upkeep the Kozii requires. Kiinde’s instruction manual (PDF) says that you should clean the Kozii every two to three days by emptying the water chamber and refilling it with about a cup of fresh water mixed with some mild soap. Swirl it around, empty, and repeat. Every two months, descale the Kozii (to remove mineral deposits) by mixing a half cup of white vinegar with one cup of water and pouring the mixture into the machine. Let sit for to 20 minutes, empty it, and rinse it. Last, the Kozii is also one of the most expensive warmers we tested, but it comes with a one-year warranty..
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