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.
Flower boxes: Try this unexpected take on a centerpiece: Plant your stems in aged, wood boxes. A mix of blooms and heights give this arrangement a relaxed, organic feel well suited for a rustic celebration.