Flex Menstrual Cup

Flex Menstrual Cup

Welcome to our comprehensive guide on the Flex Menstrual Cup! In this article, we will delve into the world of menstrual cups and explore how the Flex Menstrual Cup has revolutionized period care. Whether you’re new to menstrual cups or seeking an alternative to traditional menstrual products, this guide will provide you with all the information you need to make an informed decision. Let’s get started!

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What is a Menstrual Cup?

A menstrual cup is a flexible, bell-shaped device made of medical-grade silicone or latex that is inserted into the vagina to collect menstrual fluid. Unlike tampons or pads, which absorb menstrual blood, menstrual cups capture and contain it, making them an eco-friendly and cost-effective option.

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How to choose the right Menstrual Cup for you?

Choosing the right menstrual cup for you can be a daunting task, but here are some tips to help you make the right choice:

  • Determine your cervix height: This is important because it will help you choose the right cup length. You can do this by inserting your finger into your vagina and measuring how far you can reach. If you have a low cervix, you’ll need a shorter cup, and if you have a high cervix, you’ll need a longer cup.
  • Consider your flow: While cup size should be determined only by fit, not flow, it’s still important to consider your flow when choosing a cup. You can buy a cup because it has a high capacity, but it has to also be a good fit. If you have a heavy flow, you’ll need a cup with a higher capacity.
  • Think about firmness: If you’re an athlete or someone who is really into Kegel exercises, you might want to opt for a firmer cup. A firmer cup can also be a good choice if you have strong pelvic muscles.
  • Take a quiz: There are quizzes available online that can help you choose the right cup for you. The Menstrual Cup Quiz by Put A Cup In It is a great resource that can help you find your best fit.
  • Read reviews: Reading reviews from other cup users can be helpful in choosing the right cup for you. Websites like Period Nirvana, The Strategist, and Ruby Cup have reviews of different cups that can help you make an informed decision.

How to measure your Cervix Height for choosing the right Menstrual Cup?

Here are some steps to measure your cervix height for choosing the right menstrual cup:

  • Wash your hands thoroughly with soap and water.
  • Find a comfortable position: You can stand with one leg up on the toilet seat, sit on the toilet, or squat.
  • Insert your index finger into your vagina: Make sure your finger is clean and lubricated. You can use water or a water-based lubricant.
  • Feel for your cervix: Your cervix is a small, round, and firm bump at the end of your vagina. It feels like the tip of your nose. You may need to move your finger around a bit to find it.
  • Measure your cervix height: Once you’ve found your cervix, measure the distance between your cervix and your vaginal opening. You can use a ruler or your finger to estimate the length. If your cervix is low, you’ll need a shorter cup, and if your cervix is high, you’ll need a longer cup.
  • Repeat the process: It’s important to measure your cervix height during your period because your cervix moves throughout your menstrual cycle. You may need to measure your cervix height a few times to get an accurate measurement.

Flex Menstrual Cup: An Overview

The Flex Menstrual Cup is a cutting-edge menstrual cup that has gained popularity among women around the world. Its unique design and innovative features set it apart from traditional menstrual cups. Let’s take a closer look at what makes the Flex Menstrual Cup stand out:

1. Comfort and Flexibility

The Flex Menstrual Cup is made from high-quality, medical-grade silicone that provides exceptional comfort and flexibility. Its soft, pliable material molds to your body, ensuring a secure and leak-free fit.

2. Mess-Free Removal

One of the standout features of the Flex Menstrual Cup is its mess-free removal. The cup features a convenient pull tab that eliminates the need for messy finger-scooping. With a gentle tug, the cup is easily removed, making your period care routine cleaner and more convenient.

3. Comfortable Wear

The Flex Menstrual Cup has a unique ergonomic design that ensures comfortable wear throughout your period. Its slim and flexible shape allows for easy insertion and provides a comfortable fit that you won’t even notice.

4. Protection for Up to 12 Hours

Unlike tampons or pads that need to be changed frequently, the Flex Menstrual Cup offers long-lasting protection for up to 12 hours. This means you can confidently go about your day without worrying about leaks or discomfort.

5. Environmentally Friendly

With increasing awareness of environmental issues, many women are turning to menstrual cups as a sustainable alternative to disposable products. The Flex Menstrual Cup is reusable and can last for several years, significantly reducing waste compared to traditional menstrual products.

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How to use a Flex Menstrual Cup?

Know your Flex Menstrual Cup

Know the Cup

Flex Cup revolutionizes the menstrual cup experience by introducing a significant enhancement: a patented pull-tab that ensures effortless and suction-free removal, taking your period game to the next level.

Crafted from medical-grade silicone, free from BPAs, phthalates, and natural rubber latex, Flex Cup provides a convenient and eco-friendly alternative to tampons. It is reusable, stain-resistant, and effectively prevents odor absorption. Additionally, its design incorporates optimal rigidity for easy insertion, making your period care a breeze.

Insertion, Wear

Insertion 1

STEP 1: Prepare Your Cup

Start by cleaning your Flex Cup. If it’s your first time using it, wash it quickly with a mild soap or Flex Foaming Cleanser. For thorough sanitation between periods, you can boil it on the stove for 10 minutes. However, be cautious and ensure the cup doesn’t touch the pot’s sides.

STEP 2: Choose Your Folding Technique

Experiment with various folding methods. One popular fold is the punchdown fold. Push one side of the cup’s rim downward with your thumb towards the base, then pinch the sides together.

Insertion 2

STEP 3: Assume a Comfortable Position

Find a comfortable position, such as sitting on the toilet, standing with one raised leg, or squatting with knees apart. Take a deep breath to relax your pelvic floor muscles. While holding the folded cup, insert it into your vaginal canal. You don’t need to push it too far back, and it’s normal for the pull-tab to slightly hang outside your body.

STEP 4: Verify Proper Placement

Ensure that the cup has fully opened by inserting a finger into your vagina and feeling around the cup’s exterior. Check for any pleats or indentations. If you detect any, try twisting the cup slightly or applying gentle pressure against your vaginal walls to aid in its proper opening. You’ll know the cup is correctly positioned when you can move around without leaks or discomfort.


Removal 1

STEP 6: Expertly Remove Your Cup

When you decide to remove your cup, begin by washing your hands. To ensure a mess-free experience, you can either sit on the toilet or remove the cup while showering. Then, effortlessly reach for the pull-tab and gently grip it or loop your finger through it. The pull-tab will break the seal for you, facilitating easy removal. Avoid pulling too forcefully or rapidly to prevent any spills.

Removal 2

STEP 7: Rinse and Repeat

Empty the cup’s contents into the toilet and proceed to the sink for rinsing. Whenever possible, wash your cup with mild soap or the specially-formulated Flex Foaming Cleanser before reinserting. In situations where access to a sink is limited, you can use Flex Biodegradable Wipes (which are plant-based and flushable) to clean your cup before reinsertion.

Related: Download the official Flex Menstrual Cup Instructions for Use

What are some common mistakes to avoid when using a Menstrual Cup?

Here are some common mistakes to avoid when using a menstrual cup:

  • Inserting the cup wrongly: It’s important to insert the cup correctly to avoid leaks. Make sure you follow the instructions carefully and practice until you feel comfortable.
  • Using the wrong size: Using the wrong size cup can cause leaks and discomfort. Make sure you measure your cervix height and choose the right size cup for your body.
  • Not cleaning your hands: Always wash your hands thoroughly with soap and water before inserting or removing the cup.
  • Not cleaning the cup correctly: It’s important to clean the cup properly to avoid infections. Make sure you follow the instructions for cleaning and sterilizing the cup.
  • Inserting too deep: Inserting the cup too deep can cause discomfort and make it difficult to remove. Make sure you insert the cup at the right angle and depth.
  • Letting the stem bug you: If the stem of the cup is bothering you, you can trim it to the right length. Make sure you don’t trim it too short, as it can make it difficult to remove the cup.
  • Emptying too little: It’s important to empty the cup regularly to avoid leaks and odors. Make sure you empty the cup at least every 8-12 hours, or more often if you have a heavy flow.
  • Getting frustrated: Using a menstrual cup can take some practice, so don’t get frustrated if you don’t get it right the first time. Keep trying until you feel comfortable with the process.

How often should you empty your Menstrual Cup?

Here are some answers to the question “how often should you empty your menstrual cup”:

  • Empty every 12 hours: The straightforward answer is that you can use your menstrual cup for up to 12 hours, after which it should be emptied and rinsed. This means that you can have a good night’s sleep without having to worry about leaks.
  • Empty every 10-12 hours: In general, across menstrual cup users, the consensus is that you should empty every 10-12 hours as an absolute maximum. If your periods are heavy or the first few days are heavy, then you will need to empty your menstrual cup more frequently to prevent leaks.
  • Empty every 8 hours: Some menstrual cup manufacturers and regulatory bodies recommend the maximum wear time before emptying your cup is 8 hours.
  • Empty more frequently if you have a heavy flow: If you have a heavy flow, you may need to empty your cup more often to prevent leaks. 
  • Check every few hours: If you’re new to using a menstrual cup, you may want to check it every few hours to see how quickly it fills up. This will help you determine how often you need to empty it.

Can you wear a Menstrual Cup overnight?

Yes, you can wear a menstrual cup overnight. In fact, menstrual cups can be safely worn for up to 12 hours, so there’s no reason they can’t be left in overnight. Compared to bulky pads or tampons, many menstrual cup users prefer wearing a menstrual cup overnight. If you typically sleep more than eight hours a night, you may prefer to use a reusable pad or period underwear as a backup. It’s important to empty and clean your menstrual cup at least every 12 hours, or more often if you have a heavy flow.

Some menstrual cup brands and regulatory bodies recommend the maximum wear time before emptying your cup is 8 hours. If you’re new to using a menstrual cup, you may want to check it every few hours to see how quickly it fills up. 

How to sterilize Menstrual Cup without boiling?

If you don’t have access to boiling water or prefer not to boil your menstrual cup, there are alternative methods to sterilize it effectively. Here are a few options:

  • Sterilizing Tablets or Solutions: You can use sterilizing tablets or solutions specifically designed for sterilizing menstrual cups or baby bottles. Follow the instructions on the package for proper dilution and soaking time. After soaking, make sure to rinse your cup thoroughly with clean water before using it again.
  • Hydrogen Peroxide Solution: Create a solution by mixing equal parts of 3% hydrogen peroxide and water. Submerge your menstrual cup in the solution for at least 10 minutes. Rinse it thoroughly with clean water afterward.
  • Vinegar Solution: Mix equal parts of white vinegar and water to create a solution. Soak your menstrual cup in this solution for about 30 minutes. Remember to rinse it thoroughly with clean water afterward to remove any vinegar odor.
  • Rubbing Alcohol: Dip a clean cloth or cotton pad in rubbing alcohol (at least 70% concentration) and wipe the entire surface of your menstrual cup. Make sure to cover all areas and crevices. Allow the cup to air dry completely before storing or using it.
  • Microwave Sterilization: Check if your menstrual cup is microwave-safe. If it is, place it in a microwave-safe container filled with water. Microwave the cup and water on high for 3-5 minutes, or as per the manufacturer’s instructions. Use caution when removing the container from the microwave as it will be hot. Let the cup cool down before using it.

Is Flex Right For You? Take our Quiz


  • Flexible, soft silicone (firmness rating of 2 on a scale)
  • All-black color that doesn’t show stains
  • Potentially useful for those with a very high cervix
  • Soft and flexible stem (suitable for stem lovers)
  • Leak-free (personal experience may vary)
  • Bonus inclusion of 2 Flex Discs in the discovery pack
  • Easily available for purchase at Target, in stores, and on Amazon


  • Difficult to clean compared to other cups
  • Stretchy stem that is prone to breakage
  • Stem suction and pull can be challenging, especially in a vaginal environment
  • Not recommended for use with any form of prolapse
  • Not suitable for low or dipping cervixes, as the internal stem may cause discomfort, nausea, or cramps

Flex Menstrual Cup

Reusable Menstrual Disc



The Flex Menstrual Cup is a game-changer in period care. Its innovative design, comfort, and eco-friendly nature make it a popular choice among women worldwide. By choosing the Flex Menstrual Cup, you’re not only taking care of your own comfort but also making a positive impact on the environment. So why wait? Try the Flex Menstrual Cup today and experience a new level of freedom and confidence during your periods.

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Frequently Asked Questions (FAQs)

How do I choose the right size of the Flex Menstrual Cup?

Choosing the right size is crucial for a comfortable and effective fit. The Flex Menstrual Cup offers two sizes: Size 1 for women who haven’t given birth vaginally and Size 2 for those who have. If you’re unsure which size to choose, consult the sizing guide provided by the manufacturer.

Can I use the Flex Menstrual Cup during physical activities?

Absolutely! The Flex Menstrual Cup is designed to accommodate an active lifestyle. Its flexible and secure fit ensures that you can engage in sports, swimming, yoga, or any other physical activity without worry.

How often should I empty and clean the Flex Menstrual Cup?

The Flex Menstrual Cup should be emptied and rinsed at least every 12 hours. However, individual needs may vary, and some women may need to empty it more frequently on heavy flow days. It’s important to follow the manufacturer’s instructions for cleaning and care.

Can the Flex Menstrual Cup get stuck inside me?

No, the Flex Menstrual Cup cannot get stuck inside you. The cup is designed with a unique shape and a flared base that allows for easy insertion and removal. However, if you’re having difficulty removing the cup, simply relax and gently pinch the base to release the seal before pulling it out.

Is it safe to use the Flex Menstrual Cup overnight?

Yes, the Flex Menstrual Cup is safe to use overnight. Its high capacity and leak-free design provide reliable protection throughout the night, allowing you to sleep comfortably and confidently.

Can I use the Flex Menstrual Cup if I have an IUD?

Yes, you can use the Flex Menstrual Cup if you have an IUD. However, it’s essential to consult with your healthcare provider to ensure that the cup is compatible with your specific type of IUD and to learn the proper insertion and removal techniques to avoid any interference with the IUD strings.

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Hi, I'm Sushil Singh, a devoted dad and guiding voice in the transformative journey of parenting, based in Mumbai. Drawing from a decade of firsthand experience and extensive research, I offer authentic insights into prepartum, pregnancy, and postpartum stages at Pregnancy Boss. From joyous milestones to challenging uncertainties, my mission is to provide reliable support and practical advice, helping you navigate this profound journey with confidence. Let's embrace the beauty and complexities of parenthood together. Connect for guidance or shared stories. Cheers to our shared path! 🥂 Social Medial Profiles: Quora Pinterest Twitter Facebook

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