You mean breast milk ice pops? It’s for teething. Some mummies make popsicles to help ease teething pain for baby. Depends on your baby, whether teething at 6m? Some teething at later stage. Once hit 6m n above, some mummies make add fruits in the milk to freeze it. Eg blueberries, Apple, pear ( tiny bits )
It can sooth their gums when teething ☺️