A simple pacifier holder that you can just pop on the side of a crib to hold pacifiers. I have included the Fusion 360 file to adjust sizing for your specific crib and pacifier. Currently it is for a 50mm pacifier and fits on a ~20mm crib rail. 

You can print with support as it is modeled currently or flip it on its side and print without supports as long as you dint mind the top face and circle being not quite as smooth.