Morning Coffee is a beloved ritual for hundreds of millions of people worldwide. 

Now, a team of inventors has improved the daily pleasure, creating some metal grains that keep drinks hot up to 5 hours. 

The beans in question, called Coffee Joulies, cool drink to a good temperature to drink, in a time of five times faster than normal, and then maintain this temperature. 

They absorb heat from the beverage when it is too hot and then releases it to maintain optimal fluid temperature when it starts to cool. 

Although this device seems to work despite the laws of thermodynamics, Coffee Joulies contain a special, nontoxic, stainless steel casing in the form of coffee beans. 

A spokesman said: “This material is designed to melt at 140 degrees Fahrenheit [60 °] and absorb more energy when it melts. In this way the coffee cool Joulies three times faster than normal. “ 

“Once you reach this temperature, especially the material begins to solidify again, releasing the stored energy when melted. Thus, Joulies keep coffee hot for two times longer than normal. “ 

Use of these grains is very simple: all you need to do is add them as soon as you drink it in the cup poured. 

And not necessarily have to be a coffee lover to use Joulies Coffee: they work on any hot drink, be it tea, or milk chocolate. 

Unfortunately, currently sold only in U.S. beans have a pretty hefty price: $ 50 pair, and works best when the cup is fitted with a lid.