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The ~180ml rice cups have been around for at least as long as rice cookers have existed.

It makes sense because 1 rice cup is the right amount of uncooked rice to make a decent serving for 1 person. A metric cup is too much!

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I don't know how much rice you eat, but my experience has been that 1 rice cup cooks enough rice for a modest serving for 2 adults - in our household at least.

The general idea is that a cup of rice is the main portion of the meal, and the rest of the meal is add ons (mostly veggies with a bit of meat). If the rice is just a side to the entree, then yeah, you're going to be eating less of it.

That's the idea but as someone who have been in Asia all my life rarely do people eat the entire cup per meal. 0.5-0.7 cup per person is more common this days for standard meal.

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