Can we use CDA to buy milk powder or diapers??

Unfortunately, CDA cannot be used for milk formula or diapers - it is mainly used to cover vaccinations and infant/childcare fees :) If you have difficulty affording milk powder, there is an initiative called the CDC Milk Fund that gives vouchers for families to redeem milk formula from NTUC-Fairprice - though I'm not sure whether it's still open for applications now. Otherwise, you can also reach out to family service centres or apply for ComCare Short-to-Medium Term Assistance!