Moon Cup Menstrual Cup Review

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Written by Leigh Matthews, BA Hons, H.Dip. NT


Leigh Matthews, BA Hons, H.Dip. NT

Sustainability Expert

Leigh Matthews is a sustainability expert and long time vegan. Her work on solar policy has been published in Canada's National Observer.


The Moon Cup was the first silicone menstrual cup, created in the UK and sold for the first time in 2001, paving the way for other menstrual cup makers. This menstrual cup is made with medical grade silicone making it hypoallergenic, durable, non-toxic, latex-free, and eco-friendly.

Moon Cup Menstrual Cup

Leaf Score

Highlights: Made with medical grade silicone so the menstrual cup hypoallergenic, durable, non-toxic, latex-free, and eco-friendly. Can handle heavy and light flow and comes in two sizes
Reusable for up to 10 years or so (with proper care).

Moon Cup Menstrual Cup at a glance:

Country of Origin:UK
Materials:Medical grade silicone
Certifications:ISO 13485:2012 certified (Mooncup Ltd’s company headquarters and manufacturer)
Mooncup’s storage bag is made from unbleached organic cotton by a Fairtrade Foundation accredited business.
Packaging and promotional materials are produced by the UK’s leading environmental printer who work to the internationally recognized ISO quality and environmental management standards.
Vegan Society certified
Table of Contents
  1. Moon Cup Menstrual Cup
  2. Overview
  3. Moon Cup vs. The Keeper vs. Diva Cup


The Moon Cup is reusable for up to 10 years or so, with proper care (although it may start to discolor, which does not affect performance). The makers of Moon Cup highly recommend not boiling the cup and instead cleaning it by rinsing the cup in warm soapy water and then in a solution made of one part vinegar to nine parts water. This, they say, can extend the life of menstrual cups, compared to boiling the cup every month.

As with other menstrual cups, Moon Cup can handle heavy and light flow and comes in two sizes. Size B (View Price on Walmart) is intended for people who are under thirty and have never given birth, or who have given birth by C-section. Size A (View Price on Amazon) is for everyone over 30 or those under 30 who have given birth vaginally.

The makers of Moon Cup have demonstrated a long-lasting commitment to environmental and social initiatives. They run their own Advice Line staffed by qualified medical personnel, are an employee-owned business, are careful to always use ethically sourced and produced packaging, and are certified by the Vegan Society. They were the first sanitary protection manufacturer in the world to be awarded Ethical Business status for its people- and environmentally-friendly practices, were named one of the top 10 ethical businesses named by The Good Shopping Guide, and were awarded ‘Best Buy’ status following independent research by Ethical Consumer magazine. Moon Cup Ltd. also won a Women in Ethical Business Award, and they support menstrual health education programs worldwide, providing subsidized menstrual cups for charities and non-profit organizations.

Moon Cup is distributed in the U.S. by the same company that makes The Keeper (itself first sold in 1987).

Moon Cup vs. The Keeper vs. Diva Cup

The Moon Cup is identical in shape to The Keeper (which is made from latex) but has a longer stem for easier retrieval. This stem is also longer than that of the Diva Cup. If the stem is too long and feels uncomfortable, it’s fine to trim it with scissors. Other than that, Moon Cup has the advantage of having been around longer than any other silicone menstrual cup, with a solid track record for performance and durability.

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