Actually, I have purchased a similar item called the "Happy Valentine Glass Rose," which has a spherical bubble in the glass at one end, the better to show off the attractive plastic flower inside.  :roll:

I can tell you this, do NOT attempt to clean it over the stove.  The glass is not tempered and will become demonically porous; thereafter it acquires the remasrkable property of magically making large quantities of spice vanish without a trace.  Not in a good way.