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Mueller Ultra Kettle M99S Review

This low-cost glass kettle is illuminated by LED lights around the base and has a large capacity for busy kitchens
Mueller Ultra Kettle M99S
Credit: Mueller
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Price:   $33 List | $29.97 at Amazon
Pros:  Large capacity, decent boil time, cool LED lights
Cons:  Fragile, no insulation, shut-off delay
Manufacturer:   Mueller
By Nick Miley, Michelle Powell and Austin Palmer  ⋅  Mar 7, 2021
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Our Verdict

This low-price unit has cool lights and a large water capacity. Other than that, this model is quite ordinary as it is a single setting, pitcher-style machine that boils water in just under average time. However, when compared to other pitcher-style units, it pours predictably and smoothly.

Our Analysis and Test Results

This Mueller Ultra Kettle M99S is a flashy but capable unit that is reasonably priced. However, if you need features such as temperature adjustment and holding, this machine will leave you in the lurch. Yet, we find the cool lights (and the price) to mitigate much of the unit's shortcomings.

Subtle blue LED lights add some pizzazz to this basic glass kettle.
Subtle blue LED lights add some pizzazz to this basic glass kettle.
Credit: Jason Peters

Boil Time


The Mueller will bring 4 cups of water to a boil in 4 minutes and 36 seconds — about average for the class. The boil test we use for our kettle reviews is basic but telling. We start with four cups of 57° F water and pour it into the unit's reservoir. We switch the kettle to ON and concurrently activate a stopwatch. When the water reaches a rolling boil the watch is stopped and the time recorded. To ensure boiling point consistency, we include a thermometer. At our headquarters elevation, a boil occurs at ~201° F.

This unit boils water in average time -- about 4 minutes and 36...
This unit boils water in average time -- about 4 minutes and 36 seconds for 4 cups of tap water.
Credit: Jason Peters

Pouring


Evaluating how a kettle discharges water from its reservoir is a critical aspect of our evaluation. When compared to the class as a whole, the Mueller does not impress. However, when compared to the other pitcher-style models, its standing improves significantly. The unit is relatively balanced, and, as its reservoir is clear, it's easy to see when the water is approaching the lip so that one doesn't tip too aggressively. Slow pouring aside, this model's relatively broad spout allows for hasty pours when necessary.

As far as the pitcher-style models go, this unit is easy to pour in...
As far as the pitcher-style models go, this unit is easy to pour in a controlled fashion.
Credit: Jason Peters

Ease of Use Features


The Mueller has a short list of ease of use features. The inside material is glass — with makers at 0.5, 1.0, and 1.8 liters — allowing one to reference the water level with a glance. It has an automatic shut-off feature that resets the ON/OFF switch when a boil is achieved and the lid is attached by a hinge with a spring-loaded, push-button release.

This unit offers very few ease of use features, save automatic...
This unit offers very few ease of use features, save automatic shut-off and a push-button hinging lid. Nonetheless, the low cost and quality construction sum-up to a good value.
Credit: Jason Peters

Value


Despite the limited features on the Mueller, we find its low cost to reflect an overall good value to consumers. We came to this conclusion because the unit is well designed, boils water in a respectable period of time, and the price is among the lowest in the class.

Conclusion


This review of the Mueller Ultra Kettle M99S covers every aspect of this machine that a consumer will want to know before they get out their wallet. Specifically, we looked at boil time and pouring characteristics. Additionally, we collated the ease of use features that add to the product's range of functionality. All told, this article serves as an easy-to-use comparative analysis that allows one interested in an electric kettle to confidently pick a device to match their needs and budget.

Nick Miley, Michelle Powell and Austin Palmer