A container for airtight sealing certification reference material includes a top, a bottom, and a sidewall spanning between the top and bottom to define an interior. The container also includes an opening in the upper surface of the top, providing passage to the interior. The container further includes a recessed ring formed in the upper surface of the top, which may be concentric with the opening. The container includes an inductive seal coupled to the upper surface of the top, wherein the inductive seal is at least partially disposed in at least one recessed ring. A middle portion of the container between the top and bottom may have a generally truncated biconical shape. The container may also include a set of threads near the top to allow a
screw cap to be attached to the container.