Disques d'étanchéité en silicone Kiki : remédier aux fuites des biberons
By Pura Stainless | Stainless Steel Baby Bottles | MADE SAFE ... | Published: 2026-11-03
Category: Tips & Care
Stoppez les fuites de lait dans le sac à langer avec un diagnostic simple : vérifiez le col, le disque et le joint. Découvrez quand un disque d'étanchéité Kiki est la solution et quand il ne l'est pas.
Quick answer
If your Pura Kiki bottle leaks only when stored or carried, a Kiki silicone sealing disk is likely the fix. But if it leaks during feeding, the problem is usually the collar or nipple, not the disk.
Why leaks happen in the diaper bag but not at home
A bottle that sits upright on the counter may never leak, even with a loose seal. But in a diaper bag, it gets tipped, squeezed, and jostled. That's when a worn or missing sealing disk shows up. The disk creates a flat, tight barrier against the collar, so milk can't escape through the top. Without it, or with one that's damaged, any pressure change or tilt can force liquid out.
When a sealing disk won't help
If the bottle leaks at the collar threads or around the nipple during feeding, a sealing disk won't solve it. Those leaks usually mean the collar is cross-threaded, the nipple is torn, or the bottle is overfilled. Check those parts first. Also, sealing disks are designed for storage and transport, not for feeding. They replace the nipple and collar top entirely, so you can't feed with one in place.
Diagnose your leak
- Symptom: Milk leaks only when the bottle is in the diaper bag or being carried.: Likely cause: Missing, worn, or improperly seated sealing disk. Corrective action: Check that a Kiki silicone sealing disk is in place under the collar. If it's torn, stretched, or doesn't lie flat, replace it. Make sure the disk sits flush against the collar rim before screwing the collar on. If the disk is intact and seated, but leaks continue, move to the next symptom.
- Symptom: Leaks at the collar threads even with a sealing disk.: Likely cause: Cross-threaded collar or overfilled bottle. Corrective action: Unscrew the collar and reseat it carefully, making sure the threads align. Fill the bottle only to the fill line (if marked) or leave at least an inch of headspace. If the collar is cracked, replace it. If the collar is fine and the leak persists, the disk may be the wrong size or type.
- Symptom: Leaks around the nipple during feeding.: Likely cause: Worn nipple, loose collar, or baby's feeding angle. Corrective action: Inspect the nipple for tears or looseness. Tighten the collar firmly. If the nipple is damaged, replace it. A sealing disk is not the solution here. Stop: If feeding leaks continue after checking nipple and collar, contact Pura support.
Product facts
- Kiki™ Silicone Sealing Disks: Fits any Pura bottle and replaces any Pura silicone top. One disk turns a bottle into a leak-resistant storage container or snack holder, so you don't need a separate container.
Kiki™ Silicone Sealing Disks
