Invention of the Day: Magical Beans Keep Your Coffee Warm for Hours

Magical Beans Keep Your Coffee Warm for Hours

These magical beans can keep your coffee hot for hours. Not blazing hot, burn your tongue on the first sip, and not disappointingly lukewarm, but coffee fit for every baby bear—just right. Genius.

Invention of the Day: Magical Beans Keep Your Coffee Warm for Hours

But not really magic. The beans, called "Joulies" by inventors Dave & Dave, are made out of a metal phase-change-material inside a stainless steel shell. As soon as you drop Joulies into a boiling hot cup of coffee, the metal inside the beans melts, absorbing heat until your lovely liquid reaches a perfect 140 degrees Fahrenheit. It only takes a few seconds. As your perfect cup begins to cool, the metal inside the beans solidifies, releasing heat little by little, keeping the beverage warm for several hours.

The metal inside a Joulie is not special in its ability to absorb and release heat. Any substance that melts absorbs heat, and any substance that solidifies releases heat. The inventors used this well-known tenet of thermodynamics to fuel their invention.

The only downside of this seemingly wonderful modern coffee-lovers solution is that, although Joulies are shaped like a traditional coffee beans, they are actually much larger and so displace a lot of liquid in your cup. But, frankly, refilling your cup a few times is a small price to pay for perfect temperature coffee for hours.

Invention of the Day: Magical Beans Keep Your Coffee Warm for Hours

The inventors Dave & Dave were neighbors and classmates in Pennington, NJ who engineered, prototyped, and hand-manufactured the first Joulies. They are now trying to raise money to manufacture their magic beans on Kickstarter; the project has been up for weeks now and has accumulated $89,000 in startup cash. If you support the idea, go donate.  

11 Comments

Brilliant. Just Brilliant.

be careful not to swallow one, you might get "heart burn".

wow, haha, somebody had to go there : )

i need some these beans!!! that's really cool.

Who would like to have hours old coffee in a mug? These beans seems to be suitable for keeping your hands warm when going to school or to work on a chilly day. Or birdwatching on windy seashore. I would buy a payr or two.

better than reheating it in the microwave over and over...(as i do)

Putting metal in your food is very unhealthy for your mental health, as well as your physical health, even when it is to be removed. It has been proven to produce, if not, highlight mental disorders, in which most people do have some type of mental incapability already.

Your statement is suspect. Do you not cook with metal pots & pans? Do you not eat with silverware? Everyone else does, and they (for the most part) are doing fine...

Well what im saying is it really needs to be toned down, the world only looks fine, its only getting worse, this thing just isn't necesary. This little luxury item would be doing overall more harm than good, and not just for health. Gismos like these that give off no mental stimulation are considered a waste of resorces, according to our ecconomic state. But overall I feel a need to say such because you would be suprised how a change in scenery could really affect the mind and body, whether you know it or not.

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