Quick answer
A leaking glow in the dark sippy cup is usually due to a misaligned valve, loose spout cover, or worn silicone. Follow the steps below to diagnose and fix the leak, or know when it's time for a new cup.
Why the glow feature matters for troubleshooting
The glow in the dark material is embedded in the silicone spout and cup body. While it doesn't affect the seal, the spout's flexibility can change slightly after many washes. If your cup leaks, start with the spout assembly before assuming the cup is defective.
Leak diagnosis steps
- Symptom: Liquid drips from the spout when the cup is tipped or shaken.
- Likely cause: The mouth-activated valve is not fully seated or the spout cover is loose.
- Corrective action: Disassemble the spout, remove and reinsert the valve until it clicks into place. Tighten the spout cover by hand until snug. Test with water before filling with milk or juice. If the leak stops, the cup is good to use.
- When to stop or replace: If the spout or valve shows cracks, tears, or permanent deformation after repeated cleaning, replace the cup. The silicone may wear out over time, especially if washed in high heat. A damaged spout cannot be repaired; buy a new glow in the dark sippy cup to maintain the leak-proof seal.
Product facts
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glow in the dark easy sipper 2pk: The cup features a 100% soft silicone spout with a mouth-activated, non-spill valve and a spout cover. If the valve isn't seated correctly or the cover is loose, the non-spill design can leak during active use.
glow in the dark easy sipper 2pk
