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A leaking baby bottle is usually caused by assembly, worn parts or incorrect compatibility rather than the bottle simply being defective.
Check the collar and teat seating
If the teat is not seated evenly in the collar, milk can escape around the edge.
Do not overtighten or cross-thread
A collar that is misaligned can prevent a proper seal.
Check for worn components
Old teats, damaged seals or worn threads can cause leaks even if the bottle previously worked correctly.
Do not mix incompatible parts
Use components intended for the exact bottle system. Similar-looking parts from another range or brand may not seal correctly.
Avoid overfilling
Leave appropriate space and follow the bottle's markings and instructions.
Frequently asked questions
Can a worn teat cause bottle leaks?
Yes. A stretched, damaged or incorrectly seated teat can prevent a proper seal and cause leaking.
Why did my bottle suddenly start leaking?
Inspect the teat, collar, threads and seals for wear or incorrect assembly.
Can I use another brand's teat on my bottle?
Do not assume compatibility. Use approved components for the exact system.
For replacement options, browse baby feeding bottles and accessories.
Related baby bottle help
For recurring leaks, also check whether the bottle itself needs replacing in our baby bottle replacement guide, and review teat size and flow guidance. If replacement is needed, compare current baby feeding bottles in Kenya.
