I'm getting a lil experimental myself using fake flowers that I purchased from the dollar store. I put them in glass cups and nice sized candle holders. Glass round ones . And I even used an old coffee pot with fake flowers and gravel inside. It fills a lot of empty space this way.
Then for the bottom I used a very thin layer of gravel with varying sized rocks that I boiled. (Easy cleaning and yet it hides the poo) So far all my guests have raved about it, lol. Have you decided what to do?