Magic Beans to Keep Your Coffee Hot: Coffee Joulies

Back when Coffee Joulies were just a Kickstarter project, I felt like these heat-absorbing beans that promised to cool your coffee to drinkable temperature and keep it there could turn into either an easily-dismissed gadget or a gimmick. A few weeks ago, I finally had a chance to try them for myself.The beans are about the size of a soup spoon and bigger than I expected.

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Tech Universe: Wednesday 6 April - NZ Herald