A swab comprises a support structure, a first cap and a second cap. The support structure has a first end, a central portion and a second end. The first cap has a first cap end and a first open end, wherein the first cap end includes a first end outer surface, a first end inner surface and a first plurality of protrusions protruding from the first end outer surface. The second cap has a second cap end and a second open end, wherein the second cap end includes a second end outer surface and a second end inner surface. The support structure is insertable into the first open end such that the first end contacts the first end inner surface and is insertable into the second open end such that the second end contacts the second end inner surface.
