Popgadget: Instant noodles have been around long enough that we take their 2-minute preparation time for granted. Now Japan brings us Hotto! Raisu – specially packed rice that can be served up as a piping hot meal, just by pouring water over the packaging. No cooking required!
The rice is packed by being subjected to 4,000 times the normal atmospheric pressure and thus retains its moisture. The rice packet contains an exothermic agent which is activated when water is poured over it, taking about 15 minutes to heat the packet’s contents to an appetizing temperature.
Hotto! Raisu for dinner – self heating rice [Popgadget]
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regular rice can be cooked within 15 minutes.