Fresh Baby Food Trays are specially designed to simplify feedings and reduce waste of baby food or breast milk. All you do is pour expressed breast milk or pureed baby food in the food safe trays, put them in the freezer and use what you need when you need it. The neat thing about the trays is that they have covers, so there are no spills, no mess and no odours. Each So Easy Tray makes 12 pre-portioned servings which measure about one ounce (30mls), which is a single serving of baby food for a baby. Several cubes of breast milk can be thawed for a baby's feeding (2-5oz is typical). Breast milk cubes are the perfect answer to many situations. Since cubes defrost quickly, they are great for topping-off bottles, thinning baby food or just adding a little extra nutrition to your baby's cereal. You'll only thaw what you need-----convenient for Mom, Dad or any caregiver. See why parents say So Easy Trays are the best. They won't spill and are an easy stackable way to safely store breast milk and pureed baby food. Cover, stack and freeze---it's that easy! the heavy duty construction allows quick release of the frozen food cubes. And they are dishwasher safe, so clean up is a breeze. Trays are FDA-approved food-safe plastic. #4 LDPE (low density polyethylene) and #2 HDPE (high density polyethylene). Contains NO PVC, BPA or placticizer.