Before use: Ensure hands are clean and sanitized before handling bags. Check bag is properly sealed before opening.To store milk: Carefully open bag from top and use wide opening to pour expressed breast milk. Close bag using double self-sealing system, ensuring tight seal to prevent leaks.To store: Place bag in desired position: vertically for easy handling or horizontally for more efficient storage in freezer or refrigerator. Use writing area to write date and time of milk expression.During transport: Use the included case to organize and protect bags during transport, keeping them clean and safe.To defrost or warm: Transfer bag with frozen milk to refrigerator or place in warm water to defrost. Do not heat directly in the microwave or in boiling water to preserve the nutrients in breast milk. To feed your baby: After heating, transfer the milk directly from the bag to the bottle in a practical way and without waste.