From the manufcaturer:
These cases are the perfect companion for any stationary lover. Each case can be zipped closed for easy transportation, and transformed into a pen cup to hold favorite pens and pencils upright on a desk when you're ready to use them. Simply place your writing supplies in the body, your eraser in the elastic on the top, and zip closed. When you want to use the contents, open the case, press the bottom down on a desk, and watch the case transform into a cup that pushes your writing supplies upward to make then easy to see and use. This prduct is made from silicon.