For pumping families it pairs neatly with a last pump: partner gives the dream-feed bottle while mom pumps, and everyone banks the same long stretch. Some babies genuinely sleep longer for it; others ignore the scheme entirely, and two weeks of trying answers the question for yours.
Every bag and bottle you add gets its best-by and use-by dates computed automatically from these exact rules, the oldest safe milk sits on top of the Use next queue, and a warning arrives the day before anything expires, while you can still act.
Milk First speaks this whole language for you: seshes logged in two taps, every bag on its correct clock.
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