What is best to use as storage for breastmilk? Storage bags, trays or cups?

I prefer storage bags. Storage cups take up way too much space. I used storage bag, and even 1 upright freezer is not enough. Can’t imagine how many freezers i’ll need if i were to use storage bottles. If you decide to use storage bags, you can consider getting Ameda. It’s on promo now. I like this kind of storage bags because the portion whereby you write baby’s name etc is at the top flap. So don’t have to worry about the ink seeping through into the bag and contaminating the milk or anything. https://welovesupermom.com/products/asn-4205-510-ameda-storen-pour-breast-milk-storage-bags