Your local thrift store likely has at least a couple shelves of vases. If you find an odd-shaped one, consider turning it ...

With the frame complete, use excess cardboard to make shelves that your flower vases will fit on, and mount them with hot ...

I painted one of my vases in hot pink with peach stripes and another in lilac and ultramarine blue checkers. Experiment with different colour combinations and designs! Just add Water (and Flowers)!