How to Sterilize and Store Menstrual Cups Between Cycles

By HEVEA: Natural Rubber Products for baby, pet, home | Published: 2026-10-15

Category: How-to Guides

A simple routine to sterilize, dry, and store your menstrual cup between periods so it stays fresh and ready for your next cycle.

Quick answer

Rinse your cup with cold water, wash it with a mild, fragrance-free soap, then boil it in a dedicated pot for 5–10 minutes. Let it air-dry completely, and store it in a breathable cotton pouch or a ventilated container — never sealed in plastic. Do this at the end of each period, and you're ready for the next cycle.

Why the between-cycle routine matters more than the daily rinse

During your period, a quick rinse is often enough to get you through the day. But once your cycle ends, the cup will sit unused for weeks. Any residue left behind — blood, vaginal fluid, or soap film — can become a place for odor or bacteria to develop. A proper end-of-cycle clean and a smart storage spot keep the cup ready to use without a last-minute scramble.

Natural rubber cups need a slightly gentler approach than silicone. High heat is fine for short sterilization, but harsh chemicals, essential oils, and long soaks can break down the material over time. Stick to mild soap, water, and brief boiling.

What you need before you start

Gather a small, dedicated pot you won't use for food, a slotted spoon or tongs, mild fragrance-free soap, and a clean cotton pouch or a container with airflow. If you don't want to boil, you can use sterilizing tablets or a cup steamer — just follow the manufacturer's timing and don't exceed it.

Avoid antibacterial soaps, scented washes, and anything containing oils. They can leave residue that irritates sensitive tissue or degrades natural rubber.

How often should you sterilize?

Once at the end of each period is enough for most people. If you're switching between cups, or if you've had a yeast infection or bacterial vaginosis, sterilize before and after use. You don't need to boil every day — over-boiling can shorten the life of a natural rubber cup.

Drying and storing without trapping moisture

Moisture is the enemy of long storage. After boiling, shake off excess water and let the cup air-dry upside down on a clean cloth or drying rack. Once it's completely dry, place it in a breathable cotton pouch or a container with small vents. A sealed plastic bag or airtight jar can trap dampness and encourage odor.

Store it away from direct sunlight and heat. A bathroom cabinet is fine as long as it's not steamy; a bedroom drawer works too. If you use a storage container, check that it has at least one air hole.

Step-by-step: sterilize and store your cup

Rinse with cold water first: Hold the cup under cold running water to remove blood and discharge. Cold water prevents proteins from setting into the rubber. Mistake to avoid: using hot water first, which can bake residue onto the surface.
Wash with mild, fragrance-free soap: Gently rub the cup inside and out with your fingers and a small amount of mild soap. Rinse thoroughly until no slippery film remains. Checkpoint: if the cup still feels slick, keep rinsing — soap residue can cause irritation.
Boil in a dedicated pot for 5–10 minutes: Place the cup in boiling water and set a timer. Use tongs or a slotted spoon to keep it from touching the bottom of the pot, which can scorch natural rubber. Mistake to avoid: boiling for 20+ minutes or letting the pot boil dry. Short and gentle is safer.
Air-dry completely: Lift the cup out and let it cool, then place it upside down on a clean cloth or drying rack. Don't rub it with a towel, which can leave lint. Checkpoint: no visible moisture inside or out before you store it.
Store in a breathable pouch or ventilated container: Keep the dry cup in a cotton pouch or a container with air holes. Avoid sealed plastic bags and airtight jars. Next step: note the date you sterilized it so you know it's ready for your next cycle.

Products that fit this routine

LOOP Menstrual Cup - Combo Sizes 1 & 2: The HEVEA LOOP Menstrual Cup Set combines Size 1 and Size 2, made from 100% natural rubber from the Hevea brasiliensis tree. Having two sizes means you can sterilize both at the end of your cycle and store them together, so you're covered whether your flow is light or heavy.
Period Hipsters: HEVEA Period Hipster Panties feature a high-rise hipster fit with organic cotton against the skin and a multi-layer construction. On lighter days or as backup, period hipsters reduce the number of times you need to sterilize your cup, extending its life.