Adding essential oils to the wash

I got this ball to add vinegar to the rinse cycle when I wash our cloth diapers. I honestly never got around to using it. Today I was washing a wool cover I use on the sofa and was planning on adding purification to the rinse and grabbed this ball. I added water and 5 drops of purification to the wash. A lot of oils aren't good to use and store in plastic but I figure since the oil only spent a few minutes in the ball the plastic it shouldn't degrade the plastic. We will see how it worked.....