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Coffee Joulies - Set of 5. As seen on Shark Tank

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  • Coffee Joulies - Set of 5. As seen on Shark Tank
  • Coffee Joulies - Set of 5. As seen on Shark Tank
  • Coffee Joulies - Set of 5. As seen on Shark Tank
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Product Description

Coffee is too hot
Use Joulies to cool it down
And keep it perfect

Tired of burning your tongue on coffee only to have it get cold a few minutes later? With Coffee Joulies™ your coffee will be ready to drink faster and will stay in the perfect temperature range longer. Each polished stainless steel shell is filled with an advanced phase change material that melts at 140°F. Put them in your coffee and they absorb heat when it is too hot, storing that energy inside. When your coffee reaches the perfect temperature this stored heat is released to keep it there longer. The 5-Pack works with up to 20 oz of coffee, one bean per 4 oz.

Coffee Joulies™ Set of 5 include:

  • 5 Coffee Joulies (made in the USA)
  • Instruction card
  • Joulies logo carrying pouch

"The beans really work" - Food Network Magazine
"The mug with the Joulies rapidly cooled to 140 degrees and held steady for 2 hours" - Cooks Illustrated


How do I use Coffee Joulies?

Step 1 - Add at least 1 room temp Coffee Joulie for every 4 oz (120ml) of hot beverage you plan to drink. You may round up for a more pronounced effect. For example, using 5 Joulies with 12 oz of hot black coffee will give better performance than just 4.

Step 2 - Add the hot drink to the cup. Remember that the hotter the drink, and the more insulated the container, the more effective the Joulies will be. Ideally, you are pouring freshly brewed black coffee (~185F) into a well insulated travel mug. Cooler coffee and less insulated mugs will impact performance.

Step 3 - Use a lid for the first 5 minutes. This allows heat energy to be absorbed, and for the coffee to cool down to a safe temperature. If you normally do anything else to cool the coffee, like blow on it, add cold water or ice, try just using the lid for a few minutes instead.

Step 4 - Enjoy the perfect temperature coffee! Once Joulies have absorbed all the energy they can, they will start to release it to keep your coffee in the perfect range for as long as possible. Keep the lid on as much as possible to keep heat inside! The total length of time before the coffee gets cold, is determined by how well insulated the container is, the more insulation, the longer the coffee will stay hot!

How do Coffee Joulies work?

Coffee Joulies are designed to improve the temperature profile of your hot beverage and improve your overall experience. To achieve this, they do two things:

Absorb heat to cool down coffee fast - To solve the problem of coffee being too hot at first, Joulies absorb heat from hot coffee and store it in something called 'Heat of Fusion' - more on this later. Only heat that is absorbed while the coffee is above 140F (60C) will be able to be released back into the coffee later. This is due to how PCM's work. How much heat is absorbed, and how fast, also depend completely on the conditions Joulies are used in. See the FAQ for more information on different containers.

Release heat to keep coffee in the perfect temperature range for longer -
Once the coffee is below 140F any extra time that coffee would have been too hot is now extra time that you get to enjoy your coffee at the perfect temperature. The total amount of time before your coffee gets cold is dependent entirely on how well insulated of a container you use. 

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