Periods are a regular occurrence for billions of people around the world, fueling a feminine hygiene products industry valued at $24 billion a year and growing. While once dominated by pads and tampons, the industry has diversified, and people now have a vast array of cups, discs, and underwear to deal with their “time of the month.” Despite feminine hygiene products being a necessity for half the population, the topic remains taboo, preventing women from being free to talk about them, and marginalized, preventing disadvantaged women from even having products in the first place.