"We believe in choice, which is the heart of feminism, " says Gloria Jacobs, executive director of the Feminist Press at the City University of New York, who sought opinions on items like Foot Petals and bra-boosters from two of her interns, Tiffany Hervey and Dior Vargas.

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China Martens, founder of Kidz City, a anarchist-feminist collective in Baltimore, developed a model for organising such co-operatives.

BBC: Eight radical solutions to the childcare issue