- Modgy Expandable flower vases do everything a glass vase does except collect dust, chip or break. Available in a variety of designs, Modgy plastic vases are durable and stable enough to hold a flower bouquet. These decorative vases are ideal for events, weddings, and any table top. Modgy vases are collapsible and economical, making it easy to keep a variety of colors and patterns tucked away for any occasion.