Buy the blue SILEX vase with height 21 cm. on the Shop Decor website. The designer of the Silex vase collection for Serax, Sylvain Willenz, plays with shapes and creates magnificent decorative vases. Looking at the vases from top to bottom, they don't have a well-defined shape: they look like cylinders and squares. The faceted corners are in stark contrast to the curves of the glass. Silex vases are perfect for every corner of your home.