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Right when you thought nail polish science couldn’t blow your mind more than it already does seemingly every day — every hour — they went and invented nail polish that changes colors when you dip in water. (Maybe carry some in a Tupperware container in your purse.) Careful with this video, though, because it takes something strange out of you.
The Mood Polish costs $8, although as of this posting that website doesn’t seem to work, so who even knows.