Materni bottles are suitable for the hygienic collection and storage of breast milk and the preparation of formula. They are  bottle warmer, microwave, dishwasher and freezer safe making them highly versatile. Bottles have a screw on cap to ensure micro-biological cleanliness and have clear volume markings to make milk preparation quick and easy.  They are available in four sizes: 50 ml, 80 ml, 120 ml and 240 ml.