You can boost the height and visual drama of any arrangement with the help of a serving bowl from the kitchen or china cabinet. Set a vase inside the bowl, and then fill both vessels with billowing flowers.
Line bowl with plastic wrap.
Place floral adhesive on underside of vase. Set vase in bowl.
Fill bowl with soaked floral foam. Arrange lilac stems in foam.
Add water to vase, and fill with more lilacs.