Written by a mom who's lived it
As the founder of Sticky Monkey Labels and a mom of three boys — including two with food allergies and one with special needs — I know exactly how stressful those first daycare drop-offs can be. Getting the bottles right is one less thing to worry about. Here's everything you need to know.
Sending your baby to daycare for the first time comes with a long list of things to get right — and baby bottles are near the top. Daycare workers are responsible for making sure every child gets the right bottle with the right milk or formula, in the right order, at the right time. The way you clean, fill, and label those bottles directly affects how smoothly that happens.
This guide covers everything: proper cleaning and sterilization, how to prepare breast milk and formula safely, what to do before you pack the bottles, and how to label them so there's zero confusion at the daycare center — including which bottle labels work with popular bottle brands like Comotomo®, Tommee Tippee®, and Avent®.
In This Article
How to Clean and Sterilize Baby Bottles Properly
Proper cleaning isn't just good habit — it's the first line of defense against illness and cross-contamination. Here's the full process:
- Wash your hands first. Use warm soapy water for at least 20 seconds before handling any bottle components. This step is easy to skip when you're rushing — don't.
- Disassemble the bottle completely. Take apart every component — bottle, nipple, ring, cap, and any valves — and rinse each piece under warm running water. Do this whether the bottle is brand new or was previously used.
- Never rest components in the sink. The sink basin harbors bacteria. When you're not actively rinsing a piece, set it on a clean paper towel or fresh cloth — not on the sink surface.
- Scrub with hot, soapy water. Use a dedicated bottle brush for the inside of the bottle and a nipple brush for the nipple. These brushes should be used exclusively for baby bottles — never for dishes or anything else. When you're done, sterilize the brushes themselves in boiling water or a dishwasher sanitation cycle as the manufacturer recommends.
- Rinse thoroughly and air dry. After scrubbing, rinse all components again under clean running water. Place them on a clean drying rack and allow to air dry completely before filling.
How to Prepare Breast Milk for Daycare
Breast milk is packed with antibodies and nutrients that support your baby's immune system and healthy development — but it requires careful handling to stay safe. Here's how to prepare it correctly for daycare:
- Clean bottles first as described above before filling with anything.
- Defrost frozen breast milk in the refrigerator — allow 12 to 24 hours for it to fully defrost. Don't rush the process at room temperature.
- Shake the bag or container gently once defrosted to mix the cream layer back into the rest of the milk. Breast milk naturally separates and needs to be recombined before use.
- Fill each bottle with the appropriate amount and refrigerate immediately. Do not leave filled bottles at room temperature.
How to Prepare Formula for Daycare
Formula preparation is more straightforward than breast milk but still requires attention to detail — particularly around water safety and timing.
- Clean and sterilize bottles first as described above.
- Prepare your water. The CDC recommends using water boiled to at least 158°F (70°C) when preparing infant formula. Alternatively, you can use purified, distilled, deionized, or demineralized bottled water.
- Mix formula in the correct proportions as directed on the formula packaging. Do not estimate — the ratio of formula to water matters for your baby's nutrition and digestion.
- Stir or swirl to mix, pour into bottles in the correct amounts, cap, and shake gently.
- Refrigerate immediately until you're ready to pack them.
What to Do Before You Pack the Bottles
Once your bottles are filled, there are a few critical steps before they go into the daycare bag:
- Keep them refrigerated right up until you pack them. Filled bottles should stay cold — never sit at room temperature between preparation and packing.
- Pack them in a cooler or insulated bag with an ice pack to maintain temperature during transport. Inform daycare staff that the bottles need to go straight into the refrigerator on arrival.
- Label every bottle before it leaves your home. This is non-negotiable — more on this in the next section.
- Communicate with daycare staff in writing about how many bottles you're sending, what they contain, and any specific reheating or handling instructions. Don't rely on verbal handoffs at drop-off — write it down.
How to Label Baby Bottles for Daycare — and Why It Matters
A labeled bottle is a safe bottle. In a room full of babies with similar bottles, an unlabeled one is a problem waiting to happen — wrong child, wrong formula, wrong order of use. Clear labeling eliminates all of that confusion and gives daycare staff exactly the information they need at a glance.
Our bottle labels for daycare are waterproof, tear-resistant, dishwasher-safe, microwave-safe, bottle warmer and sterilizer-safe, and refrigerator-safe — built to handle everything a daycare bottle goes through in a day.
Because bottles come in all shapes and sizes, we carry several configurations to make sure your label actually fits and stays put:
Designed to fit the body of the bottle — the ideal choice when the rim is too narrow or has ridges that prevent a rim label from sitting flat. These go on the main barrel of the bottle where there's the most flat surface area.
Specifically designed to fit Comotomo® bottles, which have a wider, rounder rim profile. If your baby uses Comotomo® bottles, this is the label that will fit correctly and stay secure.
Designed for slant-back rims — the shape found on Tommee Tippee® and Avent® bottles. The curved profile of these labels matches the angle of the rim so they sit flat and adhere properly rather than lifting at the edges.
For parents who want to write the date of preparation directly on the bottle. Compatible with waterproof pencils and semi-permanent markers — ideal for tracking freshness and ensuring bottles are used in the correct order.
Other Daycare Labels Worth Having Before Day One
Bottles are just the start. A fully labeled daycare bag means less confusion, fewer lost items, and a much smoother handoff every morning. Here's what else we carry:
- Baby label packs — 84 waterproof labels perfect for pacifiers, cups, food containers, wipes, diaper cream, and other accessories. Everything in one order.
- Daycare label packs — 106 labels covering the full kit: bottles, clothing, bags, shoes, and more. The most comprehensive option for parents who want to label everything at once.
- Label starter packs — 50 labels, ideal if you want to start with the essentials before committing to a larger pack.
- Clothing labels — stick-on clothing labels for care tags and tagless imprints, and iron-on labels for iron-safe fabrics. Both options are built for the wash cycle.
- Shoe labels — waterproof labels designed specifically for the curved surfaces of baby and toddler shoes.
- Meal labels — for snack containers, lunch bags, and any food items going to daycare.
- Allergy and medical alert labels — if your baby has any allergies or dietary restrictions, these labels put that information directly on their belongings where daycare staff will see it immediately.
Frequently Asked Questions
How many baby bottles should I send to daycare?
Most daycare centers recommend sending one bottle per feeding plus one extra. For a full day, that typically means three to five bottles depending on your baby's feeding schedule and age. Check with your specific daycare for their requirements — some have their own policies on bottle quantity and storage.
Do baby bottle labels need to be waterproof?
Yes — absolutely. Daycare bottles go through refrigerators, bottle warmers, sterilizers, and dishwashers in a single day. A label that isn't waterproof and heat-resistant will peel off quickly, leaving an unlabeled bottle that can't be matched to the right child. Our bottle labels for daycare are waterproof, dishwasher-safe, microwave-safe, and bottle warmer and sterilizer-safe.
What information should I put on a daycare bottle label?
At minimum, include your baby's full name and the date of preparation. Some parents also include the contents (breast milk vs. formula), the volume, and reheating instructions. The more clearly labeled the bottle, the easier the job is for daycare staff — and the safer the process is for your baby.
Which bottle label works with Comotomo bottles?
Our slim baby bottle rim labels are specifically designed to fit Comotomo® bottles. The wider, rounder rim profile of Comotomo® bottles requires a different label shape than standard bottles — these fit correctly and stay secure through daily use.
Which bottle label works with Tommee Tippee or Avent bottles?
Our curved bottle rim labels are designed for slant-back rims like those on Tommee Tippee® and Avent® bottles. The curved profile matches the angle of the rim so the label lies flat and adheres properly rather than lifting at the edges.
How long is prepared formula good for?
Unless the manufacturer's instructions specify otherwise, prepared formula should be used within 24 hours of preparation and kept refrigerated until use. Never reheat formula more than once — if a bottle has been warmed and your baby doesn't finish it, discard it and prepare fresh.
How long is defrosted breast milk good for?
Defrosted breast milk should be used within 24 hours of fully defrosting. Keep it refrigerated throughout and do not refreeze. As with formula, never reheat breast milk more than once — discard any warmed milk your baby doesn't finish.