Review (3/5): Meh.
While they hold the indicated volume, they're nothing like what's pictured. I didn't want something that looked like a cosmetic container, which is why I chose these, only to receive what are clearly cosmetic containers. Frustrating.
With that said, though, they're made well, seal completely, and work as advertised. (Note: the attached picture shows the lid slightly unscrewed, to make the seam more visible. With the lid completely screwed, the jar is fully sealed.)