So I bought these milk collection shells from Medela, and they are great! I don’t understand why I didn’t buy them earlier. I am breastfeeding 100% and I have been keeping milk in the freezer in Medelas storage bags. But while breastfeeding it leaks out and it comes a lot from time to time. To save time I’m collecting with these cups. After I freeze the milk to ice cubes. Perfect and saving time.