the black sprayers do not work as well as the white ones [SEP] i know that seems impossible but i have had cobalt bottles with the white sprayers and have had zero issues i bought more bottles and they came with black sprayers i use them with essential oils and they get so clogged and barely squirt i have takin them apart and cleaned them and it is no betterand i use doterra oils so it is a quality oil i am in the process of ordering just the white sprayers but i have to pay s h on them since they are not on prime