NaturalWave Nipples 2 vs 4 Count: Which Pack Fits Your Baby?

Start with flow, then decide how many to keep on hand

The 2-count and 4-count packs hold the same NaturalWave nipple; the difference is how many spares you keep in rotation. Before you choose a pack size, settle two things: which flow your baby is using now, and how often you expect to replace nipples. Lansinoh recommends changing the nipple every 7 weeks and inspecting it daily for wear or tears, so a larger pack mainly buys you fewer reorders, not a different feeding experience.

Both packs are designed for Lansinoh bottles and will not fit other wide-sized bottles. Lansinoh also does not recommend using its nipple with another brand because those combinations have not been tested.

What the flow labels on the nipple rim mean

NaturalWave nipples come in slow, medium and fast flow, and the bottom rim is stamped so you can identify a loose nipple without guessing. The 4-count pack also lists an Extra-Slow option.

• Size 2S: slow flow: The slow-flow nipple reads Size 2S on the bottom rim. This is the flow to check first if milk is spilling onto your baby's neck during feeding, which Lansinoh describes as a sign a slower flow may be needed.
• Size 3M: medium flow: The medium-flow nipple reads Size 3M. Lansinoh does not give an exact age for switching flows; the decision is based on how your baby feeds.
• Size 4L: fast flow: The fast-flow nipple reads Size 4L. If your baby sucks for a long time but cannot get milk out as quickly as before, Lansinoh describes that as an indication a faster flow may help.
• Extra-Slow: The 4-count pack lists an Extra-Slow variant. The supplied record does not give a rim marking for Extra-Slow, so check the pack label rather than relying on a stamp.

2-count vs 4-count: what changes for your routine

The pack size does not change the nipple's design. It changes how many clean spares you have between washes and how soon you need to reorder after the 7-week replacement guidance.

• 2-count pack: Comes with 2 Lansinoh NaturalWave Nipples and lists Slow, Medium and Fast flow variants. A sensible starting point if you are still trialing one flow, or if you keep only a small number of bottles in use.
• 4-count pack: Comes with 4 Lansinoh NaturalWave Nipples and adds an Extra-Slow variant. Better suited to households that want a clean spare available while others are washed, or that already know the flow they need.

How many nipples you actually need

Count nipples the way you count bottles: one in use, one clean and ready, and one being washed or dried. If you run bottles through the dishwasher, remember NaturalWave nipples are dishwasher safe on the top rack only, and Lansinoh recommends gentle handwashing to extend their life.

Because the replacement guidance is every 7 weeks, a 4-count pack spreads replacements across a longer stretch than a 2-count pack. That is the practical case for buying the larger pack once you have settled on a flow, and the practical case for the smaller pack while you are still deciding.

Pack contents and flow options

• NaturalWave® Nipples - 4 count: The 4-count pack contains 4 Lansinoh NaturalWave Nipples and lists Extra-Slow, Slow Flow, Medium Flow and Fast Flow variants. More nipples per pack and an Extra-Slow option make it the better fit if you want a clean spare on hand or need the slowest listed flow.

  

• NaturalWave® Nipples - 2 count: The 2-count pack contains 2 Lansinoh NaturalWave Nipples and lists Slow Flow, Medium Flow and Fast Flow variants. A smaller commitment if you are still trialing a flow or keep only a couple of bottles in rotation.

  

A simple routine for choosing and rotating nipples

Use the same sequence each time you open a new pack so you do not mix flows or lose track of wear.

1. Check the rim before the first feed: Read the bottom rim to confirm the flow: Size 2S for slow, Size 3M for medium, Size 4L for fast. For Extra-Slow, check the pack label.
2. Match the flow to feeding cues: Lansinoh's own cues are a long suck without getting milk as quickly as before (try faster) and milk spilling onto the neck (try slower). There is no exact age for switching.
3. Inspect daily and replace every 7 weeks: Check for wear or tears each day, discard any torn or compromised silicone, and follow the 7-week replacement guidance.
4. Clean without weakening the silicone: Top-rack dishwasher is acceptable, but gentle handwashing is recommended to extend life. A nipple brush can be used gently, without poking through the hole. Avoid prolonged direct sunlight, heat or sanitizing solution.

Two compatibility checks before you buy either pack

First, confirm you are using Lansinoh bottles. The NaturalWave nipple is designed for Lansinoh bottles and will not fit other wide-sized bottles, and Lansinoh does not recommend pairing it with another brand because that combination has not been tested.

Second, do not plan to heat bottles in the microwave. Lansinoh does not recommend heating breastmilk or any liquid for a baby or toddler in a microwave, or heating the bottle in the microwave in any form, because microwaves can create hot spots and damage breastmilk nutrients.