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It's actually droplets formed on the inside of a rice cooker lid. Thanks for the guess. 💦

Oh ok. I want to get one of those. I used to always just make minute rice, but now I am into making sushi, so it might be a good investment to have.

It works really well for making sushi rice. You can use a pot too but the rice cooker clicks off at just the right time and then you can unplug it and let it steam for a bit.