Using these flower vases is easy. First, assemble the vase by attaching the cup to the hollow stem and then the base. Fill the vase with water and place long - stemmed flowers inside. They are great for adding a decorative touch to your events. When it comes to maintenance, simply wash them with mild soap and water. Avoid using harsh chemicals as they may damage the plastic. Also, be careful when handling the vases to prevent them from falling and breaking.