The jars work great. See photo of before and after.  Jar labels did not cover most common spices though (see photo again for substitute labels in white not provided).  For example, bay leaf, cinnamon, coriander, cayenne, allspice, basil, ginger, etc. Labels that were included with black font cannot be read against most dark spices.  
The funnel material is not appropriate for spices as they cling to the silicone.