I agree with what everyone has said before in that different children are in them for different periods of time. Liam was 4 kg born and wasnt in them very long. He went into "Infant" which you can get in a Box but just not in supermarkets. I emailed and complained to Huggies why Infant arent in boxes and they provided me with a list of wholesalers(bulk sellers) that sell them in boxes, (plain packaging). HTH