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Day 291 of 300 · Week 39

Thirty-nine weeks: cups in, bottles out

Last reviewed · 4 min read · 7 sources · Plain-text version

The AAP's bottle plan: a cup at meals now, off bottles between 12 and 18 months, meal bottles kept longest, nap and bedtime ones dropped first. The bottle map, written tonight.

A Latina mother at a sunny kitchen table steadying a small open cup for her thirty-nine-week-old in a buckled high chair, water on the baby's chin, a white father pouring coffee at the far counter.

Thirty-nine weeks. The cup has sat on the tray at meals for weeks now, mostly as a toy. Today is the plan for the bottles: which stay, which go first, and the one that never happens.

Heart

The AAP's advice is to offer a cup at meals now and finish moving off bottles between 12 and 18 months (Shu, AAP). Nothing about what your baby drinks changes this week: breast milk or formula is still the main drink, plus 4 to 8 ounces of water a day (Muth, AAP). Drinking from a cup without a lid as you hold it is a 12-month milestone (CDC), and the cup on the tray is the practice. What changes today is that the bottles get names.

Head

Why the AAP sets a window at all: bottles that go on longer are linked to cavities, skipped meals, and more resistance later. The method is gradual. Keep bottles at meals at first, drop the ones at naps and bedtime, and offer extra cuddles and stories instead; an open cup, a straw cup, or a sippy cup without a valve all work (Shu, AAP). So the order writes itself: the bedtime and nap bottles are first out, the meal bottles last. The one rule already in force is the crib: never put your baby to bed with a bottle, because sugary residue left in the mouth overnight promotes tooth decay (AAP). The guide's answer is When should my baby stop using a bottle?

Body

What the cup carries at 39 weeks is water. At 12 months, most babies can switch from formula to whole milk (AAP), and that's tomorrow's note. If you're breastfeeding, the map below is for bottles, not for you: the AAP supports continuing as long as you both want, to 2 years or beyond (Muth, AAP).

Try today

  1. The mother and father at the kitchen counter after bedtime, four clean bottles in a row, the father writing on a sheet of paper while the mother points at the last bottle in the line.

    The bottle map

    Time: 10 minutes after bedtime, both adults · Cups in, bottles out in the guide

    1. List every bottle from today with its time and what it was for: a meal, a nap, bedtime, or comfort in between.

    2. Write "stays" beside the meal bottles; they're the last to go (Shu, AAP).

    3. Write "first" beside the nap and bedtime bottles, and next to each, what replaces it: a story, a song, a longer cuddle (Shu, AAP).

    4. Write the date you'll start, anywhere from the first birthday, and the date it's finished, no later than 18 months (Shu, AAP).

    5. Tape the map to the fridge where the sitter and the grandparents will read it.

    Make it work:

    If there are no bottles because you breastfeed, the map is one line, "no plan needed," and it's true (Muth, AAP).

Watch for

  • Normal

    a bottle refused with the cup in sight, then taken five minutes later.

    Call your pediatrician right away

    if your baby has great trouble swallowing fluids or spit (AAP).

  • Normal

    one bottle still wanted at night; many babies this age don't need to eat at night, but some do.

    Ask your pediatrician before cutting night feeds,

    and check first if your baby isn't growing and gaining weight steadily (AAP).

  • Normal

    a cough on a gulp of water that went down fast, over in a breath.

    Call 911

    if your baby is choking and can't breathe, cry, or make noise, turns bluish, or goes limp (AAP).

For you

The mother alone in the dim kitchen taping the handwritten bottle map to the fridge door at eye level, a board book and a bottle side by side on the counter behind her.

A plan, not a fight. The fight, when there is one, is rarely with the baby. It's with the grandmother who thinks a bedtime bottle is love, the sitter who takes the quick route at nap time, and the two of you at 7 p.m. when nobody has the energy for a story instead. The map ends all three, because the dates on it are the AAP's, 12 to 18 months (Shu, AAP), and everyone reads the same fridge. Nothing on it happens this month. The only rule for tonight was already a rule: no bottle in the crib (AAP).

If you're the partner: the bedtime bottle is yours on the map, which means the book that replaces it is too. Pick it now and put it next to the bottle on the counter, so the swap is already half made.

Sources

This guide is general education that summarizes published research and guidance from groups like the American Academy of Pediatrics, the CDC, and the WHO. It isn’t medical advice, and every child develops on their own timeline. Your pediatrician knows your child; if something feels wrong, call them. In an emergency, call 911.

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