The set includes 4 ventilation seals, 2 seals for straws, and 2 seals for large bottles. The silicone seals protect the bottle from leaks, ensuring tightness and safe use. They are slightly flexible and arranged to facilitate use and cleanliness maintenance. Using necessary spare parts reduces unnecessary waste and contributes to maintaining proper hygiene. The seal is an essential part that extends the bottle's lifespan and prevents the generation of unnecessary plastic waste. The product is free from harmful BPA and PVC compounds, suitable for contact with food. It is not a toy and should be kept away from children.