... dropper 18/415 essential oil glass bottle 30ml with dropper 18/415 ,Amber glass dropper bottle ,Electrochemical aluminum ... be 5ml,10ml,15ml,20ml,30ml,50ml,100ml,200mlthe bottle neck size is 18/415 .the color can be Amber, blue ,green ... ,the below green glass bottle is 20ml,30ml,50ml ,the plastic dropper ...