Milkies Milk Trays, a breast milk freezing system, makes pumping and storing breast milk easier. Similar in appearance to an ice cube trays, Milk Trays are designed specifically for expressed milk. They are made from PET plastic, a food-safe plastic that contains no bisphenol-A (BPA), phthalates, or dyes. Milk Trays freeze your milk in 1-ounce “Milk Sticks” that fit through ALL bottle openings and allow you to thaw just the right amount of milk for each feeding. Milk Trays have fitted lids that protect your milk while it freezes and allow for space-saving stacking in the freezer, and the trays are flexible enough to allow the Milk Sticks to be removed easily. And, last but not least, Milk Trays are reusable and can be used to freeze other things, like baby food!