Ceres Chill — The Breastmilk Storage Game-Changer

How to Use Pump Converters with Ceres Chill: A Step-by-Step Guide

How to Use Pump Converters with Ceres Chill: A Step-by-Step Guide

By Ceres Chill — The Breastmilk Storage Game-Changer | Published: 2026-09-06

Category: How-to Guides

Learn how to pump directly into your Ceres Chill using pump converters. Step-by-step guidance, compatibility checks, and practical tips.

Quick Answer

To pump directly into your Ceres Chill, you'll need a pump converter that matches your breast pump brand. Attach the converter to the Chiller's opening, connect your pump flange, and pump directly into the inner chamber. Verify compatibility before buying, and always clean all parts thoroughly.

Pumping directly into your Ceres Chill eliminates the need for separate bottles and extra transfers, saving time and reducing milk loss. With the right pump converter, you can create a seamless setup that keeps milk cold from the moment it's expressed. This guide walks you through the process, from choosing the compatible converter to attaching it correctly.

You might be wondering if pump converters are universal. They're not—each brand has its own threading and fit. But many Ceres Chill models come with a universal opening that works with most major pumps when you use the correct adapter. Let's break down what you need and how to use it.

Pump Converters
pump converters

Know Your Chiller Model and Converter Compatibility

Before you start, identify your Ceres Chill model and its opening size. The OG+ Portable Chiller/Warmer - 28oz and the Demigoddess Mini Chiller/Warmer - 12oz have different capacities and may require different converters. Check your pump's flange size and threading as well. Most converters screw onto the Chiller's outer chamber, where the lid usually goes.

Ceres Chill products are designed to work with all major pumps, but you may need an adapter. For example, the OG+ lists 'Compatibility with all major pumps' as a feature. Similarly, the Demigoddess mentions 'Compatibility with all major pumps.' If your pump isn't in the compatible list, you might need a third-party adapter.

A common mistake is assuming all converters fit all Chill models. Always check the product specifications or contact customer support if you're unsure. This small step prevents frustration and potential milk spills.

  • Check your Chiller model and pump brand before buying a converter.
  • Look for adapters listed as compatible with your specific pump model.

Assemble the Converter and Attach to the Chiller

Once you have the right converter, place it securely onto the Chiller's opening. Depending on the design, you may screw it on or press it into place. Ensure it's tight to prevent leaks. Then attach your pump flange to the converter's other end. The connection should be snug but not forced.

For pump-and-go scenarios, consider whether you'll pump directly into the inner chamber or use the outer chamber for extra storage. The OG+ allows you to store up to 28 ounces in the inner chamber, but the total capacity is 38 ounces when using both chambers. For pumping, the inner chamber is ideal because it keeps the milk cool with the freezable core.

If you're using a warmer feature, check if the converter is compatible with the warming function. Most converters don't interfere, but it's good to verify.

  • Always dry the threads before attaching to avoid slipping.
  • Test the seal before you start pumping by turning the Chiller upside down over a sink.

Pump, Store, and Clean Up

After attaching, pump as usual. The milk flows directly into the Chiller's inner chamber. Once done, remove the pump flange and converter. Place the Chiller lid on, and your milk stays cold for up to 24 hours (for the OG+) or 16 hours (for the Demigoddess).

After pumping, disassemble the converter and clean all parts thoroughly. Some converters are dishwasher safe, but always check. If you're using All Natural, Non-Toxic Pump Wipes to clean pump parts in a pinch, they're residue-free and safe for on-the-go cleaning.

A checkpoint: make sure the inner chamber is properly sealed before you store the Chiller in a fridge or cooler bag. This prevents leaks and maintains the cold temperature.

  • Clean the converter immediately after each use to avoid milk residue buildup.
  • Consider using a bottle brush for hard-to-reach areas of the converter.

Step-by-Step: Pump Directly into Your Ceres Chill

  1. Identify your Chiller model and pump brand: Check the model name (e.g., OG+, Demigoddess) and your pump's brand/threading. This determines the correct converter type. Refer to the product spec sheet; if unsure, contact Ceres Chill support.
  2. Get the right pump converter: Purchase a converter specifically designed for your pump brand and compatible with Ceres Chill's opening. Some adapters are universal, but double-check. Most major pumps work with Ceres Chill, but you may need a specific adapter—buy from reputable sources.
  3. Attach the converter securely: Screw or press the converter onto the Chiller's outer chamber opening. Ensure it's tight to avoid leaks. Test the connection by holding the Chiller upside down over a sink—if it leaks, reseat the converter.
  4. Connect your pump flange: Attach the flange to the converter's top. It should fit snugly without forcing. If you feel resistance, remove and realign—forcing it may damage the threads.
  5. Pump directly and store: Pump as usual; milk flows into the inner chamber. After pumping, remove the converter and replace the Chiller lid. Your milk stays cold for 16-24 hours depending on your model—ideal for long workdays or travel.
  6. Clean all parts immediately: Disassemble the converter and pump parts. Wash with warm soapy water or use All Natural, Non-Toxic Pump Wipes for quick cleanups. This prevents bacteria growth and keeps your pump parts in top condition.

Products That Support Direct Pumping

  • OG+ Portable Chiller/Warmer - 28oz: 24 hours of chilling for 28 ounces, 2 chilling options (ice or freeze the Inner Chamber), portable bottle warming, compatibility with all major pumps, fully dishwasher safe parts. This model's compatibility with all major pumps means you're more likely to find a converter that fits, and the 28-ounce capacity is perfect for a full day's pumping.
  • Demigoddess Mini Chiller/Warmer - 12oz: 16 hours of chilling for 12 ounces, portable bottle warming, compatibility with all major pumps, the best materials for you and your baby. If you're on the go and pumping smaller volumes, the Demigoddess is easier to pack, and its pump compatibility ensures you can still pump directly into it with a converter.
  • All Natural, Non-Toxic Pump Wipes: Non-toxic with 6 all-natural ingredients, residue-free, can be used for pump parts and baby messes. After pumping directly into your Chiller, you can quickly wipe the converter and flange with these wipes between sessions, ensuring hygiene without water access.

With the right pump converter, you can simplify your pumping routine and reduce milk loss. Always verify compatibility, secure all connections, and clean thoroughly after each use. Now you can pump directly into your Ceres Chill with confidence.

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