Quick Answer

If your Kiki 11oz sippy bottle is leaking, the most common culprits are a misaligned spout, a loose collar, or a worn silicone spout. Check and tighten these parts first—most leaks stop there.

Why the Kiki Sippy Bottle May Leak

The Kiki 11oz sippy bottle is designed to be spill-proof, but like any reusable bottle, it can leak if parts aren't seated properly or if the silicone spout wears out over time. The single-wall stainless steel body is sturdy, but the seal depends on the silicone spout and collar being in perfect condition.

Because the bottle uses a medical-grade, platinum-cured silicone spout, it's flexible and durable—but it can still become misshapen if chewed on or if the bottle is stored with the spout compressed. Regular inspection helps you catch issues before they become messes.

Trade-Offs: What Fixes Work Best

While tightening the collar is the quickest fix, it's not always the right one. Over-tightening can actually warp the silicone spout and worsen the leak. If the spout is cracked or permanently stretched, no amount of tightening will help—replacement is the only reliable solution.

Also, remember that the Kiki sippy bottle is not insulated. If you're using it for warm liquids, the pressure change can cause temporary seepage. In that case, letting the liquid cool before sealing can help.

Diagnose and Fix the Leak

  • Symptom: Drips from the spout during use: Turn the bottle upside down and see if it drips. If yes, the spout may be misaligned or the collar is loose.
  • Likely cause: Misaligned spout or loose collar: Unscrew the collar, remove the spout, and re-seat it so it sits flat against the bottle rim. Screw the collar back on until snug—not overly tight. Test the bottle upside down again. If it still drips, move to the next step.
  • Likely cause: Worn or damaged silicone spout: Inspect the spout for cracks, tears, or a stretched opening. If you see any damage, replace the spout with a new one. Do not try to repair a damaged spout. If the bottle still leaks after replacing the spout, contact Pura Stainless support for further assistance.

About the Kiki 11oz Sippy Bottle

  • Kiki™ 11oz Sippy Bottle: The bottle, sleeve, collar, sippy spout, and travel cover are 100% plastic-free and MadeSafe® Certified. This means you can clean and inspect every part without worrying about plastic degradation, but you still need to check the silicone spout for wear.

    Kiki™ 11oz Sippy Bottle

    Kiki™ 11oz Sippy Bottle