Quick answer
For newborns, start with the 2oz or 5oz Lansinoh bottle; as your baby grows and takes larger feeds, move to the 8oz or 11oz size. The right choice depends on your baby's age, appetite, and whether you're using the bottle for exclusive feeding or occasional pumped milk.
Why bottle size matters for feeding success
Using the correct bottle size helps manage milk intake and reduces waste. A bottle that's too large can make it harder for a newborn to latch properly, while a bottle that's too small means more frequent refills for an older baby. Lansinoh offers four sizes—2oz, 5oz, 8oz, and 11oz—each designed for different stages.
Nipple flow differences between sizes
Lansinoh bottles come with specific nipple flows that match the size. The 2oz pack includes an Extra Slow/Newborn nipple, ideal for managing milk flow for tiny babies. The 5oz and 8oz bottles use the NaturalWave Nipple, which mimics breastfeeding and reduces nipple confusion. The 11oz pack includes a Fast Flow nipple, suited for older babies with a stronger suck. Matching the nipple flow to your baby's age is just as important as the bottle size.
Decision rules for choosing a Lansinoh bottle size
- Newborn (0-3 months): Start with the 2oz or 5oz bottle. The 2oz is perfect for small, frequent feeds (1-3 oz per feed). The 5oz offers a bit more room as your baby's appetite grows. Both come with slow-flow nipples.
- Infant (3-6 months): Move to the 5oz or 8oz bottle. Most babies take 4-6 oz per feed at this stage. The 8oz bottle with NaturalWave Nipple supports breastfeeding babies and reduces nipple confusion.
- Older baby (6+ months): Choose the 8oz or 11oz bottle. Babies often take 6-8 oz per feed. The 11oz with Fast Flow nipple works well for older babies who have a strong suck and need a faster flow. If you're using the bottle for exclusive formula feeding, the 11oz size may be more convenient for fewer refills.
- Combination feeding or pumping: Consider buying a mix of sizes: 2oz or 5oz for small expressed milk portions, and 8oz or 11oz for larger daytime feeds. All Lansinoh bottles are compatible with Lansinoh breast pumps.
Product facts
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Baby Bottles 2oz (2 pack): The 2oz (2 pack) comes with an Extra Slow/Newborn nipple flow to help manage milk intake. This makes it the best starting point for newborns or babies who need a gentle, controlled flow.
Baby Bottles 2oz (2 pack)
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Baby Bottles 11oz (4 pack): The 11oz (4 pack) includes Fast Flow nipples to accommodate your baby's growing feeding needs. Older babies who finish larger feeds quickly will benefit from the faster flow and larger capacity.
Baby Bottles 11oz (4 pack)
Which bottle size is right for you?
Best for
- Newborns and small, frequent feeds: 2oz or 5oz
- Breastfed babies needing a natural latch: 5oz or 8oz with NaturalWave Nipple
- Older babies with larger appetites: 8oz or 11oz with Fast Flow nipple
Not for
- Babies who need a faster flow from the start: 2oz and 5oz come with slow-flow nipples, so consider the 8oz or 11oz instead
- Exclusive formula feeding from birth: 2oz may be too small for formula-fed newborns who often take larger volumes
