Sustain Natural ®

WTF is a
Period Cup?

A new, reusable, sustainable alternative to tampons.

Great news!

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Why Make the Switch?

  • Earth Friendly

    Disposable period products go straight to the landfill while our period cup can be used over and over and over again.

  • Wallet Friendly

    This is a one-and-done type of deal. Switching to the period cup will save you money (and late night drug store runs) over time.

How it Works?

Much easier than you think.

  • 1 Fold to insert.

    Fold the cup into a U shape, then gently insert into your vagina. When you let go, the cup will position itself at the base of your vagina, creating a super secure, leak-proof seal.

  • 2 Wear.

    It’s completely safe to use while exercising, traveling, and sleeping for up to 6 hours.

  • 3 Empty.

    After washing your hands, pinch the base of the cup to break the leak-proof seal, gently pull at the base, and empty it into the toilet.

  • 4 Clean.

    Use warm water and gentle soap to clean the cup before each use. To disinfect, place the cup in its carrying case, fill with water, and pop it in the microwave with the lid open for 5 minutes. Good as new!

How sizing works

Two-sizes fits all.

  • Size One.

    For young people, athletic types, and those of us with lighter flows.

  • Size Two.

    For those of us who've given birth vaginally or have heavier flows.

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    No risk. All reward.

    Nervous? Don’t be! We’ve made it super low-pressure on you.

    • Free Shipping.

      Get the cup delivered straight to your door with no extra fees.

    • Free Box of Back-up.

      We’ll give you a free box of 100% organic cotton liners to use while you adjust to using the cup.

    • Money Back Promise.

      If the cup isn’t your thing, no worries—we’ll give you a full refund.

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    Made by women, for women.

    Meet Meika, our CEO. Because her family founded Seventh Generation, she’s always been a believer in products that are good for both our bodies and the planet. She thinks women shouldn't have to compromise when it comes to their sexual and reproductive health. So, she created Sustain—the first brand of all natural, vagina-friendly essentials.
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    Still have questions?

    Here are some FAQs but feel free to reach out to us anytime here.

    • Does it hurt to insert a Sustain Period Cup?

      Don’t be afraid! It may look large, but when folded properly you will have no problem inserting it. If you suffer from vaginal dryness we recommend you moisten your cup with a little water or Sustain’s personal lubricant.

    • Can I wear my Sustain Period Cup for longer than 6 hours?

      At Sustain, we're suggesting 6 hours as the max. All of our recommendations are based on the most recent scientific knowledge. The previously unknown risk of Toxic Shock Syndrome caused by menstrual cups has incited us to apply the precautionary principle and reduce the recommended wear time. We believe it necessary to inform our customers of even the most negligible risk caused by wearing a menstrual cup.

    • How long will my cup last?

      The Sustain Period Cup is reusable and if the instructions for use and care are followed, it can be used for up to 3 years.

    • I bleed heavily but I haven’t had children, which size should I choose?

      Every person is different and you know your body best. We recommend choosing based on your menstrual flow and the kind of tampons or pads you use / have used in the past.

    • Can you have sex while wearing your Sustain Natural Period Cup?

      Unfortunately, you can not. Make sure to remove your cup prior to sexual intercourse.

    Buy NowHave more questions? We can help!Chat With Us

    Sustain Period Cup Size Guide

    Size 1

    Size 1

    Light to normal flow

    Holds up to 20.2 ML

    Size 2

    Size 2

    Heavy flow

    Holds up to 29.5 ML

    More sizing questions?

    We love to chat. Email us at

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