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2. The best heated coffee mugs for 2025: Tested and reviewed - AOL

   www.aol.com/lifestyle/best-heated-coffee-mug...

   You might argue that a coffee mug warmer (you know, those $15 Mr. Coffee things) would accomplish the same goal for a fraction of the price, but most beverage reheating options pale in comparison.

3. Keep your coffee hot all day long with this $20 device - AOL

   www.aol.com/news/keep-coffee-hot-day-long...

   Well those days are finally over thanks to the VOBAGA Electric Beverage Warmer, an awesome device that can keep your coffee or tea heated to the perfect temperature for as long as you want!Here ...

4. 35 of the very best gifts for coffee lovers that they'll ...

   www.aol.com/lifestyle/best-gifts-for-coffee...

   The Nano coffee machine heats water to the perfect brewing temperature — 198°F — in less than 200 seconds. The force of 20-bar pressure produces a rich, frothy espresso that's ready to enjoy ...

5. Coffee Joulies - Wikipedia

   en.wikipedia.org/wiki/Coffee_Joulies

   Coffee Joulies are small, stainless-steel capsules containing a phase-change material; the capsules were designed to be placed in a cup of coffee in order to cool coffee that is too hot then slowly release the heat to keep the coffee warm.

6. Humidifier - Wikipedia

   en.wikipedia.org/wiki/Humidifier

   In colder months, they may provide modest energy savings, since as humidity increases, occupants may feel warm at a lower temperature. [ citation needed ] Bypass humidifiers are connected between the heated and cold air return ducts, using the pressure difference between these ducts to cause some heated air to make a bypass through the ...

7. Magic mug - Wikipedia

   en.wikipedia.org/wiki/Magic_mug

   Video of hot water being poured into a "magic mug" and the subsequent colour change A promotional magic mug filled with a hot liquid (left) and empty (right). A magic mug, also known as a heat changing mug, transforming mug, or disappearing mug is a mug that changes color when it is filled with a hot liquid.

8. Oprah's Favorite Things bestselling insulated mugs are back ...

   www.aol.com/lifestyle/oprahs-favorite-things...

   Of course, the fact that these mugs will keep your coffee, tea or cocoa at the right temperature for longer than the average cup is their biggest selling point.

9. Vacuum coffee maker - Wikipedia

   en.wikipedia.org/wiki/Vacuum_coffee_maker

   At the normal boiling point of 100 °C, the vapor pressure equals the standard atmospheric pressure of 760 Torr (760 mm of mercury). See also: Siphon § Siphon coffee A vacuum coffee maker operates as a siphon , where heating and cooling the lower vessel changes the vapor pressure of water in the lower, first pushing the water up into the upper ...