Philip Siefer enables businesses to personalise their products. The Stickvogel solution is used successfully by different global brands such as Nautica, Kipling, Butlers, Otto, QVC, IKEA and many more. In 2014 Philip challenged fellow founders to join a pledge for sustainable businesses called the entrepreneurspledge. More than 65 well-known entrepreneurs joined the call. He and his Co-Founder Waldemar made their pledge come true in February 2015 with a sustainable Design Condom, breaking records in crowdfunding.