Instead of sealing the holes with glue, why not just make a bath toy with no holes at all? It is almost impossible, because the production model must have holes, and a hole will inevitably be formed after the material is shaped.Our bath toys are completely sealed with food-grade epoxy resin, ensuring no standing water can get in, protecting your baby from harmful microbes. After each use, just rinse with water and let dry.If you encounter any quality issues, please don't hesitate to reach out to our. We will be more than happy to send you a replacement promptly. Perfect Gift This set of 9 dinosaur bath toys makes an ideal present for baby showers, birthdays, or any occasion.