Wow John! We should all be that lucky! What a wonderful problem!
Be sure to somehow cover the opening to your "vase" so that no cats will fall into the water. I think there were some really good suggestions here of using pill bottles or covering the tops of glasses with tin foil and such. I guess you could poke a hole in the top of a mason jar cover too, and then put your herbs through the hole...
Personally, I like the floral water picks, but when you have that many cats, I don't know that they would do the job. If that's something you might like to do, you can buy them at a local florist's, or walmart or the like.
https://www.walmart.com/ip/Flo...