Mueller Ultra Kettle M99S 1.8L Electric Kettle

Mueller Ultra Kettle M99S 1.8L Electric Kettle

By Mueller · Electric Kettles · Kitchen & Cooking

  • 1.8 L borosilicate glass carafe, BPA-free
  • 1500W SpeedBoil element
  • Cordless 360-degree base with blue LED indicator
  • Auto shut-off and boil-dry protection

Lowest price seen
$9.00
from $9.00 at ShopAbunda · Checked Oct 6, 2026

Prices are snapshots. Check the current price with the store.

Problems, parts and running costs

Summary

A 1.8 L borosilicate glass kettle that boils water fast and switches itself off, sitting on a 360° cordless base with a single switch on the handle. Before you buy, accept that there is no display, no temperature setting, no keep-warm and no tea infuser.

Strengths

  • Shouldit took 1.5 L of 80°F water to a rolling boil in 7 min 14 s on 148 Wh; Wirecutter found it as quick as the kettle it recommends.
  • Quiet for the class, with a peak of 70.3 dB at a rolling simmer.
  • Auto shut-off and boil-dry protection were confirmed in testing, not just advertised.
  • One switch, a lid opening wide enough to get a hand in, and a mesh filter you can rinse as you go.
  • The carafe sits firmly on the base and did not wobble while boiling.
  • Food Network named it the best-value kettle after testing more than 12.

Weaknesses

  • The base felt flimsy to Wirecutter, and Shouldit’s lowest design marks went to the handle, the lid and the switch.
  • Boil-only: no temperature control, no display, no keep-warm and no tea infuser.
  • Glass holds heat poorly. Shouldit measured 203°F five minutes after switch-off, so expect a re-boil sooner.
  • The manual cover says 900-1100W against a 1500 W nameplate, and the draw measured 1230 W.
  • The lid is plastic on the inside as well as out, the hot water touches it, and there is no silicone band.
  • No replacement parts exist for this model, so a dead base most likely means a new kettle.

Verified specifications

ModelM99S, also listed as MLR0020.
Nameplate power1500 W; the M99S instruction manual cover says 900-1100W; measured draw 1230 W at 113 V.
ElectricalUS 120 V, 60 Hz, three-pronged grounded plug.
Capacity1.8 L claimed, “up to 7 cups”; Shouldit measured 57.5 fl oz (1.7 L).
Materialsborosilicate glass carafe, 304 stainless steel in the non-glass parts per listing copy, heat-resistant BPA-free copolyester handle and lid.
Controlsone-touch switch on the handle; no display, no temperature presets, no keep-warm.
Indicatorblue LED ring at the base of the carafe, lit while heating and off once the water boils.
Base360° swivel, cord attached to the base with underside cord storage and three anti-slip pads.
Safetyautomatic shut-off plus boil-dry protection; per the instrumented test, shut-off runs off a thermo fuse and only functions with the lid closed.
Filterremovable mesh limescale filter at the spout.
Lidhinged push-button lid opening to 75°, BPA-free plastic inside and out, no silicone sealing band.
SpoutV-shaped plastic, 3.1 in (8.0 cm) opening.
Cord30.3 in (77.0 cm), three-pronged.
Dimensions8.27 × 6.34 × 8.78 in; 2.4 lb (measured, empty carafe).
In the boxkettle, corded power base, user manual.
Warranty1-year limited.
Full research notes and sources

Boil speed, energy and the wattage conflict

Measured performance is the strongest part of the record. Shouldit, working to a published methodology, took 1.5 L of 80°F water to a rolling boil in 7 min 14 s and used 148 Wh to do it. Their power meter read 113 V, 10.97 A and 1230 W. Wirecutter, testing the same SpeedBoil kettle, found it boiled as quickly as the kettle it recommends. Food Network, having tested more than 12 kettles, picked this one as its best-value pick and described it as no-frills but effective.

Buy on the measured figure, not the nameplate. The M99S instruction manual cover is marked 110-120V 50/60Hz 900-1100W, while Mueller Living’s own product page and every retail listing say 1500W. No source explains the gap — it may be a manual shared across models or a labeling error — so plan for roughly 1230 W of draw and leave the rest of the circuit alone.

Heat retention, handle and lid

Glass is why the kettle looks the way it does, and it is also why the water cools. Shouldit recorded 203°F (95.5°C) five minutes after switch-off from 212°F, and attributed that to glass carafes holding heat less well than stainless. If you brew several rounds in a sitting, count on warming the water back up.

The rest of the handling notes come from the same test. The handle curve sits closer to the carafe than average and was judged inconvenient for larger hands. The lid is plastic inside and out, has no silicone sealing band, and gave off no odor on the first boil. The cord does not wrap tightly either, leaving roughly 3.74 in including the plug protruding.

Repairs, upkeep and warranty

Upkeep is light: clean the interior and the removable mesh filter, and the manual covers cleaning, descaling, troubleshooting and warranty, although no source states a descaling interval. There are no consumables — no filters, no cartridges — so the only running cost is descaler if you use one.

Parts are the weak point. No carafe, base, element, switch or thermostat for the M99S is listed by Mueller or by any parts supplier, and the box holds no spares, so a failed base means replacing the kettle. Warranty is 1-year limited per the packaged manual and the listing copy; one aggregator advertises 24 months, which no Mueller page confirms, so check the term you are actually sold at checkout.

Is it worth it?

It depends where the number lands. Mueller Living’s own store lists the Ultra Glass Kettle at $44.99, Walmart showed $44.99 for the 1.8 L M99S and $42.00 for the 1.5 L variant on the same page, CostLess Wholesale listed it at $29.97, and two smaller sellers had it at $23.75 and $23.50. Food Network’s roundup quoted $36 against a $40 regular price, $45 at another retailer and $80 at Wayfair.

Below about $30 it is a defensible buy for a kettle whose only job is boiling. In the $40-50 band the flimsy base and the missing parts channel start to show, and Wirecutter found a visually similar Cosori kettle with a similar boil time range, a simple on/off switch and much the same design, which is the comparison to make at that money. Above $50 there is no case for a single-temperature kettle with no service channel when a steel kettle with a water-level window or one with variable temperature costs similar. The store panel above carries the live figures.

Which model this is

This page covers the Mueller Living / Mueller Austria M99S, a 1.8 L borosilicate carafe on a cordless base, sold under several names: Ultra Kettle, Ultra Glass Kettle and Premium 1500W SpeedBoil. It also carries the internal code MLR0020, and several UPCs circulate for what looks like the same hardware. Published dimensions disagree by roughly an inch in each direction and by 0.6 lb, so treat them as unverified.

Keep it separate from the 1.5 L Mueller Living glass kettle, from the separate Mueller RapidBoil 1.8 L listing, and from stainless-bodied Mueller kettles; those are different products. “Mueller” also covers unrelated plumbing, gas and electrical-component businesses, so match on M99S or MLR0020 when you compare listings.

ASIN B07TZ5YHJN

Sources

Manufacturer:

Manual:

Independent reviews:

Retail listings:

Owner reports:

The r/fixit thread never names the model, so it is a brand-level report rather than an M99S defect claim. Owner evidence for this exact model is close to absent, and no source has published a failure rate for it.

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