An anti-theft box that is molded to support an electronic article surveillance tag within a cavity is provided. Disposed within either the base or the top of the box is a cavity for supporting an EAS sensor. The cavity is sized to receive the EAS sensor and may include a cover for further securing the sensor within the cavity to help prevent tampering with the sensor. The cavity may be visible from the exterior to a consumer so that the consumer can see the EAS marker. In one embodiment the cavity is separately formed and is inserted within an opening in the base of the box. The box may be used to support a variety of articles, including articles of jewelry.