A baby bottle should not have to be replaced every time your little one hits a new milestone. Our Lifefactory baby bottles are built on an interchangeable cap system, so one bottle can travel with your baby from their very first feeding all the way to their first sippy cup. Start with the silicone nipple for your newborn's earliest feeds, then progress through the different nipple stages as your baby grows. When they're ready, easily transition to the Sippy Spout or Straw Cap to support each new stage of development with confidence.

Our Baby Bottle Collection includes 4 oz and 9 oz borosilicate glass baby bottles, as well as 8 oz wide-mouth borosilicate glass and stainless steel baby bottles. Each bottle features an interchangeable cap system, making it easy to transition from one feeding stage to the next as your baby grows, simplifying every milestone.

OUR CAP COLLECTION

🍼 Silicone Nipples (Stage 1, 2 & 3)

4 & 9oz Baby Bottles (Stage 1, 2, 3) | 8oz Baby Bottles (Stage 2, 3)

Stage 1: 0–3 months | Stage 2: 3–6 months | Stage 3: 6+ months

F E A T U R E S

•     Up to three different stages let you increase flow gradually as your baby's feeding needs change

•     Vented design helps reduce the air your baby swallows during feeding

•     BPA-free and phthalate-free, tested to meet FDA standards

•     Top-rack dishwasher and sterilization safe

🥤 Hard Sippy Spout

A vented spout that turns the Lifefactory bottle into a sippy cup

Hard Sippy: 12+ months | Vented flow control | Fits 4 oz, 9 oz, 8 oz bottles

F E A T U R E S

•     Hard sippy spout screws on tightly with a built-in silicone valve to help control flow and prevent spills

•     BPA-free and phthalate-free, tested to meet FDA standards

•     Top-rack dishwasher and sterilization safe

🧃 Pivot Straw Cap

A folding straw for confident, upright sipping once your toddler is on the move

12+ months | Pivoting straw | Fits 8 oz wide neck bottles

F E A T U R E S

•     Straw fully extends for sipping, then folds flat into the cap for clean, mess-free storage

•     Encourages upright drinking, a natural next step after the sippy spout

•     BPA-free and phthalate-free, tested to meet FDA standards

•     Top-rack dishwasher and sterilization safe

🧺 Flat Cap (Food Storage)

A solid, spill-proof cap for storing milk, formula, or snacks between feedings

All ages | Airtight seal | Fits 4 oz, 9 oz, 8 oz bottles

F E A T U R E S

•     Solid polypropylene cap seals the bottle completely for fridge, freezer, or diaper-bag storage

•     Keeps a prepped bottle ready to go, just swap the flat cap for a nipple or spout when it's time to feed

•     Doubles as a snack container once your little one is ready for solids

•     BPA-free and phthalate-free, tested to meet FDA standards

•     Top-rack dishwasher and sterilization safe

Why Mix & Match Matters

One Lifefactory bottle is built to grow with your baby, replacing the need to buy a new bottle system at every stage. With an interchangeable cap system, you can move from nipple to sippy spout to straw cap without ever changing the bottle your baby already recognizes and trusts, whether you're feeding at 2 a.m., packing the diaper bag, or celebrating a first sip from a big-kid cup. Designed for everyday use, it provides a simple, reliable solution that supports your baby’s changing needs from newborn through toddlerhood seamlessly.

Two Tips for Choosing the Right Cap

01 Match the cap to the milestone

Start newborns on the earlier stage nipple and gradually move up through each stage as feeding needs grow and develop. When your little one is ready for more independence, introduce the Hard Sippy Spout or Pivot Straw Cap to support self-feeding and make every transition simple, smooth, and comfortable.

02 Keep a couple of caps on hand

Because every cap fits the same bottle body, you can keep a Flat Cap for storage and a feeding cap in rotation, making it easy to always have a clean, ready option on hand whenever your baby needs it most.

Frequently Asked Questions

Q: How do I know which nipple stage my baby needs?

A: Nipple stages are based on flow rate rather than age. Stage 1 is a slow flow for newborns ages 0–3 months, Stage 2 offers a medium flow for babies ages 3–6 months, and Stage 3 is a faster flow for 6 months and older.

Q: Can I use the same bottle from newborn through toddlerhood?

A: Yes. The 4 oz and 9 oz glass bottles and the 8 oz wide neck bottles are all designed around the same interchangeable cap system, swap the cap as your baby moves from nipple to sippy spout to straw cap.

Q: Are the caps and nipples dishwasher and sterilizer safe?

A: Yes, all Lifefactory caps and nipples are top-rack dishwasher safe and can be sterilized. Be sure to check that the silicone valve or gasket is properly aligned after washing so the cap seals securely before us.