I went to KKH for an antenatal class and was told they will give samples but it's a different brand each month. But yeah get a tin for emergency. then again baby may or may not like it. U can request for milk for the baby from the nurses too if u can't produce yet while admitted too. good luck!
you have to buy a tin to prepare, milk formula companies are not allowed to produce samples for stage 1 formula. but if you are asking for feeding baby in the hospital, kkh has lactogen liquid formula to feed baby during your stay (must be fed in hospital and cannot be taken home).