If I prep food on my own then thermos. Otherwise will be ready to eat food (most of the time you can find anywhere like Kiddy Palace, NTUC, Cold Storage).
Since their main is still milk. Then, morning will be milk, before going out will be food, then before afternoon nap, milk, snacks in between, dinner then milk before bedtime. You dont have to do 3 strict meals but more of a breakfast/dinner or lunch/dinner then anywhere in between milk and snacks.