Why is my baby bottle nipple collapsing?

🌀 Blocked or sealed vent:

Many bottles have a vent (in the nipple or in the bottle base) to let air in as milk flows out. If that vent is clogged with dried milk or soap—or stuck shut after washing or sterilizing—it can create a vacuum. No air = no milk flow = collapsed nipple.

🔩 Collar is screwed on too tight:

Over-tightening the bottle ring can pinch the base of the nipple or seal off the vent system. Try loosening the collar just a bit and see if the flow improves.

🐢 Flow is too slow for baby’s suck strength:

A baby with a strong or mature suck can outpace a slow-flow nipple. The suction creates a vacuum that the nipple can’t keep up with, causing it to collapse.

👅 Oral motor challenges or tension:

Babies with tongue ties, high palates, low muscle tone, or oral coordination issues may generate uneven or inefficient suction, leading to nipple collapse—especially if they’re working extra hard to extract milk.

🍼 Worn-out nipples:

Silicone nipples can wear out over time. If they’ve become too soft, cloudy, or sticky from repeated sterilizing or age, they may be more likely to collapse.

✔️ How to 

Prevent

 Nipple Collapse:

✅ Check that the vent is open.

Run warm water through it and gently flex the nipple to release any stuck spots. Make sure it wasn’t pinched closed during washing.

✅ Loosen the collar slightly.

Just snug enough to avoid leaks, but not tight enough to cut off airflow.

✅ Try a faster flow nipple

if your baby seems frustrated, sucks forcefully, or takes forever to finish a bottle.

✅ Use a high-quality, well-vented bottle.

Brands like Dr. Brown’s, Lansinoh, Evenflo Vented, or MAM Anti-Colic bottles are designed to maintain air pressure and flow.

✅ Replace old nipples.

If the nipple is stretched, sticky, or discolored, it might not hold up under suction anymore.

✅ Work with a lactation consultant or feeding therapist

if your baby consistently collapses nipples across bottle types, or struggles with breast and bottle. We can assess latch, suction, and tongue function to get to the root.

💬 Real Talk: A collapsing nipple doesn’t mean you’re doing anything wrong—it just means something in the bottle-feeding setup needs adjusting. And that’s so fixable.

If this was you last night at 3 a.m., you’re not alone. You’ve got this 💪

Tag a parent who’s troubleshooting bottle feeds