Using these flower vases is easy. First, assemble each set by attaching the hollow stem to the base and then placing the cup on top. You can fill them with water and put long - stemmed flowers inside to create beautiful centerpieces for your events. When handling the vases, be gentle as they are made of plastic and can be scratched if not careful. To clean, simply use mild soap and water. Wipe them dry with a soft cloth to keep them looking clear and shiny. Store them in a cool, dry place when not in use to avoid any damage.