Most childcare licensing rules require every container to carry the child's full name and the date. A smudged or missing label often means the daycare legally cannot serve that milk, and it comes home unused or gets tossed. Waterproof labels or masking tape plus a sharpie both work; write the label before the milk goes in your bag, when you are still thinking straight.
Whatever your baby drinks per feed, send that amount per bottle, not one big bottle. Once a baby drinks from a bottle, the remainder is on a 2-hour clock and then it is gone. Three 3 oz bottles waste far less than one 9 oz bottle. Send one extra small "just in case" bottle; a hungry growth-spurt day at daycare is real.
Many daycares will keep a few labeled frozen bags as emergency backup. Rotate them monthly so they never drift past their best-by date, and log where they are so those ounces do not vanish from your mental inventory.
Track every location you actually use: fridge, freezers, cooler bag, daycare. Moving a bag switches its clock automatically (freezer to fridge starts the 24-hour thaw window), and app labels match what you sharpie on the bag.
Move milk between locations · Match app labels to sharpie labels
Milk First has a Daycare location built in, so the ounces that leave your house stay counted, labeled, and on the right clock.
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