Yes, you can bring your friend. However, they will have to join the walk-in queue whereas you will have priority since you have already booked your donation slot. As such, if there are many donors on the day, you may not be able to make your donations together. Alternatively, your friend may call Singapore Red Cross at 6220 0183 to make an appointment at least one day beforehand. You can also make an appointment online or via the DonateBlood App.