A case for a dental treatment device includes a bottom panel having an inner surface and an outer surface. The inner surface of the bottom panel defines a first concave portion that corresponds to a shape of a bottom of the dental treatment device. The first concave portion forms a corresponding first convex portion of the outer surface of the bottom panel. The case also includes a top panel having an inner surface and an outer surface. The inner surface of the top panel defines a second concave portion that corresponds to a shape of a top of the dental treatment device. The second convex portion forms a corresponding second convex portion of the outer surface of the top panel.