I have a little boy Corbin who is almost 4 months his cortef and florinef are in a liquid suspension.  I use a syringe and squirt them into a bottle nipple and he just sucks it down.  It helps to have a fast  flow nipple.  His salt I divide over five bottles he doesn’t seem  to mind it.  He’s not on solids yet so this might change in the future just thought these ideas might help.