I took a one-night, two-day Shinkansen trip with my three-month-old and packed extremely light. Essential milk supplies went in an easily reachable small bag hung on the stroller: eight formula cubes, one can of formula with adapter and nipple, a thermos of hot water, two bottles (one spare), disposable inner bags, an insulated bottle case, disposable warmers, dishwashing sheets, a Ziploc screw-lock, Milton tablets, gauze, and cooled boiled water. Diapers were vacuum-compressed to save space. Clothing: second-day outfit, pajamas, and one spare. I packed sample-size bath items, a stroller mobile, pacifier, and baby carrier. Everything fit into our smallest carry-on, a stroller bag, and a diaper pouch.
Traveling Light: 1-Night Shinkansen Trip With a 3-Month-Old
I took a one-night, two-day Shinkansen trip with my three-month-old and packed extremely light. Essential milk supplies went in an easily reachable small bag hung on the stroller: eight formula cubes, one can of formula with adapter and nipple, a thermos of hot water, two bottles (one spare), disposable inner bags, an insulated bottle case, disposable warmers, dishwashing sheets, a Ziploc screw-lock, Milton tablets, gauze, and cooled boiled water. Diapers were vacuum-compressed to save space. Clothing: second-day outfit, pajamas, and one spare. I packed sample-size bath items, a stroller mobile, pacifier, and baby carrier. Everything fit into our smallest carry-on, a stroller bag, and a diaper pouch.
Keep Formula Warm On the Go: Disposable Warmers
One tip I forgot to mention originally was how I used disposable hot packs (kairo) to keep prepared bottles warm. After making a bottle, I wrapped the bottle in a disposable warmer and a towel, then placed it inside the insulated bottle carrier , it stayed warm for feeding on the train or between stations. Important safety note: prepared formula should be given within two hours. This low-tech trick is lightweight and perfect when you don’t want to carry an electric warmer but need a warm feed on the move.
Clean Smart: Water-Only Dish Sheets & Fewer Nipples
To avoid bulk, I didn't bring multiple nipples , washing a single nipple between feeds worked well. On the road I rinsed nipples in restrooms or with bottled water, and I carried water-only dishwashing sheets (I found mine at Daiso) that clean surprisingly well without soap. When possible, discard leftover liquids before heading home to cut weight. This approach reduced what I carried and made station transitions smoother. Quick wipes plus a rinse kept nipples usable until I could sterilize them properly.
Milton Sterilizing on the Move: Soak, Rinse, Store
I used Milton tablets and a ziplock method for sterilizing small parts. Milton solution doesn’t foam like dish soap, but it disinfects effectively: I soaked nipples and small pieces in the Milton mix for at least an hour when I could, then rinsed and wiped them with gauze before sealing in a ziplock. The photo shows how I organized parts. Double-bag the ziplock or place it inside another pouch to prevent leaks. This kept things sanitary without bulky gear and let me travel with one working bottle plus a spare.
Milton Mix: Travel-Friendly Dilution
For travel I prepared Milton at a simple dilution: one-quarter tablet dissolved in 500 ml of water, then I only took 200 ml of that solution in a ziplock for the trip. The tablet was easy to split by hand. Taking a small amount reduces weight and spill risk while still giving enough disinfectant for nipples and small items. Always follow Milton's soak-time guidance and rinse items after sterilizing. Label the bag so it doesn't get mixed up with other liquids.
Bottle Prep Shortcuts: Inner Bags & Measuring Tips
Disposable inner bottle bags are a game-changer once you learn a couple tricks. Pour hot water into the inner bag, lift it upright and gently tap or 'bounce' the bag so water spreads evenly before adding powder , it helps dissolve quickly. Or bring a second bottle to pre-measure hot water using its markings, then pour that into the inner bag to avoid fiddly measuring on the go. Both methods speed up prep in cramped train seats and make bottle-making predictable when you’re juggling baby and luggage.
Ship Bulky Items Ahead to Shrink Luggage
A neat strategy is to ship some bulky supplies ahead to your hotel or rental. Sending diapers, large formula cans, or other heavy items by courier to arrive the day you do can dramatically shrink what you carry on the train and ease station transfers. This works especially well for short stays where accommodations accept deliveries. Confirm delivery windows and fees, and label packages clearly. When shipping isn’t available, consider renting or buying certain items locally to avoid hauling everything from home.
Sleep & Routine Away From Home
Our baby didn’t show strong place anxiety on this trip , she woke twice at night (her usual) and otherwise slept much like at home. It’s hard to tell whether any wake-ups were caused by the unfamiliar bed or by her routine, so keep familiar sleep cues: the same pajamas, a small gauze comfort item, and your regular feeding routine. Pack compact comfort items in your carry-on and be prepared for possible extra night feeds. Staying flexible and preserving bedtime habits helps babies settle faster in new places.
