Every formula package includes preparation instructions. Make sure to read and follow the instructions listed for the specific formula you are using and for the age of your child. Specific instructions can be found on our product page. In general, to prepare a bottle of formula, boil the bottle and all parts for at least 5 minutes before preparation. Boil drinking water and then allow it to cool to a medium temperature. Fill your sterilized bottle halfway with boiled water. Fill the measuring scoop with the appropriate amount of formula according to the instructions on the package. Shake the mixture well and add more water until the bottle is full. Shake again and feed your hungry infant