A helpful little lcd screen lets you know what temperature your choice of beverage is, so you know it won’t be too hot or cold!

At one point, the National Coffee Association recommended a serving temperature between 180-185°F, and a few articles I read latched onto that range. We also felt that — compared with freshly brewed coffee — the mugs kept the coffee warm but negatively affected the taste over time. However, there was a threshold: when I poured cold water, the mug simply read “cold,” but it also flashed the word “empty” to indicate when there was no liquid. That may sound gimmicky but it is actually pretty useful: On the app, you can set your desired temperature (anywhere from 120 to 145 degrees in single-degree intervals, the most specific control of any mug) and view the current temperature of your drink.Personalised items will have to be produced first, which can take up to 4 business days depending on the item. Most of the mugs came with a travel lid—this one did not, and, despite moving it around to tell the charger it was still in use, it went into “sleep” mode around three hours. We also noted that the plate also worked well — even at the hottest setting — with a flat-bottomed ceramic mug. To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Consistency Tests: I measured each temperature reading of the mug against the temperature it was set to—in general, if the mug was within +/- two degrees, it was considered accurate.

Yes—although this wasn’t part of our testing protocol, I did allow some of the coffees to go cold, usually by letting the mugs get to sleep mode, and turned them back on.

If the warming plate comes with a mug, it is generally a traditional-style ceramic mug (though the Cosori on our list did have a less-common stainless steel mug). The warming plate is unique in that it lets you set the temperature of the plate itself (in one-degree intervals). I also considered consistency of the temperature over time—did the temperature fluctuate or stay consistent over time?