Hang up the water bottle, then cluck at them/call them over as if for a treat and tap the nozzle so they see the water come out. Once one gets it, the rest will follow.
oh yeah, that's right! Can the medacine I put in their water got in the water bottle without ruining the medal? I'm not worried about the water bottle I can go buy another one. But, will it hurt my chicks if it corrode?