Set of 4 airtight 250ml bottles made in Spain with high quality materials, BPA free and suitable for microwave, bottle warmer, dishwasher and freezer. Thanks to their size, they will be very useful to take baby's feeds anywhere easily. The container is graduated so you can accurately measure the amounts (very useful for breast milk) and they also have a space where you can write down important information such as dates, names, etc. By writing with a pencil, you can easily erase the data for the next use.