We have found that some oil suppliers do not filter their oils and have contaminents in them. These small contaminents include hair, plant matieral, flecks of paint from the larger bins, crystalizations bugs and any number of things that could get into a large processing batch.
ArOmis pre-filters every bottle of oil wiht 150micron stainless steel mesh, so we know that your oils do not have any of these in them.
The kit includes small plastic funnels and several cotton filter media, and an extra bottle to filter your bottle of oil into if needed.
Please see below examples of oil supply with contaminents. One such supply is Doterra.