A 3 pound package of decorative shells gives you material to divide among several displays. Scatter a measured portion around the base of a center piece, or show the shapes through a clear outer vessel around a separate floral insert. For a coastal wedding, carry a few shells into the place setting design so the tables pick up the texture of the main display. At events, portion the shells before setup to keep the amount consistent from one table to the next. For seasonal home decor, arrange a small group in a shallow bowl with sea colored accents for summer, then pair it with dried grasses for a softer coastal look as the season turns.