There is a great company, blumebox... they have come up with a why didn't I think of it concept, the paper box for flower arrangements.  These are wonderful and come in a number of vibrant colors and a number of patterns they fold up so perfect to stick in your luggage and arrive with great looking vases for your centerpieces.  I love the small blume box featured above with an orchid what a great placecard holder..... imagine the impact of a table full... available online at www.blumebox.com very reasonable at a six pack for $9.00 not more than an average place card holder.