Bouquet of peonies and anemones- I've really grown to love the idea of blush peonies some white, maybe a few ranunculus, and some anemones. I love how the center of the anemones tie in to my navy and blush pink colors!
But if the rustic box isn't your style? A wicker basket. A silver tray with lower sides. A glass bowl with moss up the sides to obscure the "mechanics" of the arrangement. A decorative ceramic serving dish. I love the subdued green and white look.