How to Clean and Care for Your Ceres Chill OG+ Portable Chiller/Warmer

Quick answer

To clean your Ceres Chill OG+, disassemble it fully, hand wash all parts with warm soapy water, and air dry completely before reassembly. For deeper sanitizing, use a gentle steam or boiling water method, but avoid harsh chemicals or abrasive scrubbers that can damage the insulation.

Your Ceres Chill OG+ is built to keep breastmilk cold for up to 24 hours, but it only works well if you keep it clean. Regular cleaning prevents bacteria buildup and keeps your milk safe for your baby. In this guide, you'll learn the best way to wash, sanitize, and care for your portable chiller so it lasts for years.

You don't need fancy equipment—just warm water, mild dish soap, and a soft cloth or bottle brush. We'll walk you through the steps, point out common mistakes, and share tips to make cleaning easier, even on busy days.

Why Regular Cleaning Matters

Breastmilk is nutrient-rich, which also makes it a great environment for bacteria if left in a dirty container. Even if you rinse your chiller quickly, milk residue can linger in corners and crevices. Over time, this can cause odors, stains, and even affect the taste of your milk. Cleaning after every use is the best way to avoid these issues.

The Ceres Chill OG+ is designed with a wide opening, making it easier to clean than many other bottles. But it still has parts like the inner chamber and lid that need attention. A consistent routine—wash, rinse, dry—takes less than five minutes and is totally worth it.

• Use a dedicated bottle brush to reach the bottom of the inner chamber.
• Wash the lid and any silicone parts separately to avoid trapping milk under them.

What You'll Need

You probably already have everything you need: warm water, mild dish soap (free of strong fragrances or dyes), a soft sponge or bottle brush, and a clean drying rack. Avoid abrasive scrubbers or steel wool, which can scratch the surface and create places for bacteria to hide.

For sanitizing, you can use a steam sterilizer or boil the parts in water, but always check the manufacturer's instructions first. The OG+ is made from food-grade stainless steel, which handles heat well, but the lid and silicone parts may have different care requirements.

• Skip antibacterial soaps—they can leave residue that's not safe for your baby.

Step-by-Step Cleaning Process

Start by disassembling your chiller completely. Remove the lid, inner chamber, and any silicone seals or rings. Rinse each part under warm running water to remove loose milk. Then, fill a basin or your sink with warm water and a few drops of dish soap. Wash each part gently with a soft cloth or bottle brush, paying extra attention to the threads and crevices.

Rinse thoroughly with clean water to remove all soap residue. Soap left behind can affect the taste of your milk and might upset your baby's tummy. After rinsing, place all parts on a clean drying rack and let them air dry completely. Do not reassemble until everything is bone dry—moisture trapped inside can lead to mold or mildew.

For a deeper clean, you can sanitize the parts once a week. Boil the stainless steel components in water for 5 minutes, or use a steam sterilizer if you have one. Let the parts cool before handling. This extra step is especially important if you've been traveling or if your baby is under three months old.

• Check for milk residue in the lid's gasket—it's easy to miss and can cause odors.

Common Mistakes to Avoid

One common mistake is putting the Ceres Chill OG+ in the dishwasher. While the stainless steel might survive, the heat and harsh detergents can damage the insulation and the lid's seal. Hand washing is always safer and helps your chiller last longer.

Another mistake is using hot water to wash the parts immediately after use. Hot water can set milk proteins, making them harder to remove. Instead, rinse with cool or lukewarm water first, then wash with warm soapy water. Also, avoid using bleach or chlorine-based cleaners—they can corrode the metal and leave harmful residues.

• Don't use a microwave to dry or sanitize the parts—it can warp plastics or rubber.

Storing Your OG+ Between Uses

Once your chiller is clean and dry, store it with the lid off or slightly ajar. This allows air to circulate and prevents any musty smells from developing. If you store it fully sealed, any residual moisture can cause mildew.

Keep it in a cool, dry place away from direct sunlight. If you have extra parts like silicone boots or pump adapters, store them separately to avoid warping. A clean, dry chiller is ready to go whenever you need it—no last-minute washing required.

• Store the inner chamber and lid separately to avoid trapping moisture.

Your 5-Step Care Routine

1. Disassemble fully: Take apart the lid, inner chamber, and any seals. Rinse each part under cool or lukewarm water immediately after use. Checkpoint: No milk residue visible before washing.
2. Wash with mild soap: Use warm water and a gentle dish soap. Scrub with a soft bottle brush, especially in threads and crevices. Checkpoint: Avoid abrasive scrubbers that can scratch.
3. Rinse thoroughly: Rinse every part under clean running water until no soap bubbles remain. Checkpoint: Water runs clear and feels slippery-free.
4. Sanitize weekly: Boil stainless steel parts for 5 minutes or use a steam sterilizer. Let cool completely before handling. Checkpoint: Do this for babies under 3 months or after illness.
5. Air dry completely: Place all parts on a clean drying rack and let them dry fully before reassembling. Checkpoint: No moisture inside—store with lid off.

Product Facts

• Personalized Ultimate Gift Bundle: 24 Hours of Chill Power - keeps up to 28 oz of breastmilk cold for 24 hours - no bulky coolers, no ice packs. Extra Large Capacity - stores up to 38 ounces total. Doubles as a Warmer & Bottle - chill, warm and feed from one container. If you use the OG+ for long workdays or travel, you'll appreciate the generous capacity. The all-in-one design means fewer items to clean and keep track of, but you still need to follow the same cleaning routine to keep it hygienic.
• Personalized 'Day-Tripper' Bundle: Choose your Chiller: Hours of Safe Chilling - 28 ounces of storage for 24 hours with the OG+, or 12 ounces of storage for 16 hours with the Demigoddess. Extra Large Capacity - up to 38 ounces with the OG and 16 ounces with the Demigoddess. This bundle lets you pick the chiller that fits your routine. If you choose the OG+, you'll have the same cleaning steps to follow, but the larger size means you'll need to be extra thorough when washing the inner chamber.

Keeping your Ceres Chill OG+ clean doesn't have to be a chore. With these simple steps, you'll ensure your breastmilk stays safe and your chiller works like new for years. Follow the routine consistently, and you'll always have a fresh, ready-to-use chiller when you need it.