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Baby Bottle Problems? Fixes (2026)
Common bottle-feeding problems: baby refusing the bottle, excess gas, nipple collapse, leaking, and slow feeding.
Most bottle problems are flow, vent, or latch problems wearing different disguises. Work through these fixes before buying a new brand.
Baby refuses the bottle
Try a different nipple shape first, particularly a wide breast-like nipple such as Comotomo or Tommee Tippee. Warm the nipple under water, have someone other than the breastfeeding parent offer it, and try when the baby is calm but hungry rather than starving and frantic. Persistent refusal across shapes warrants a pediatrician check for tongue-tie or reflux.
Baby is gassy and fussy after feeds
Switch to a vented bottle like Dr. Brown's Options+ or Philips Avent Anti-colic, feed upright with paced breaks, and burp midway and after. Check that the nipple flow is not too fast, which causes gulping. If fussiness persists for weeks with crying over three hours a day, discuss colic with your pediatrician.
Nipple collapses flat during feeding
Collapse means vacuum is building because air cannot replace the milk leaving the bottle. With vented bottles, check the vent is assembled correctly and not clogged with dried milk. With any bottle, loosen the collar slightly; an overtightened collar seals the vent path. Replace nipples showing thinning or stickiness.
Bottle leaks from the collar
Leaks usually come from cross-threaded collars, a misseated nipple, or an overtightened ring distorting the seal. Disassemble, reseat the nipple fully in the collar, and tighten just snug. Check silicone sealing rings for cracks on older bottles, and replace them rather than the whole bottle.
Questions, answered
Why does my baby take forever to finish a bottle?
Usually the flow is too slow for the baby's age, or the vent is clogged creating vacuum resistance. Try the next flow level up. If feeds exceed 30 minutes routinely, something needs changing.
Why is there foam in the milk?
Foam means air is mixing into the milk, either from shaking formula vigorously or from an unvented bottle bubbling during feeding. Swirl instead of shaking, and consider a vented bottle if foam is routine.