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A comment on Giant 'sand battery' holds a week's heat for a whole town. Parent comment
By adjusting the amount of water in the mixture, you can fine-tune the phase change temperature to whatever the customers like for their coffee.
It also boils above 100C so when the customer puts it in the microwave it won't burst unless they boil the cup dry.
And when the customer does break it, it's non toxic and food safe.
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By adjusting the amount of water in the mixture, you can fine-tune the phase change temperature to whatever the customers like for their coffee.
It also boils above 100C so when the customer puts it in the microwave it won't burst unless they boil the cup dry.
And when the customer does break it, it's non toxic and food safe.