According to Heritage Envelopes, the U.K. market uses approximately 13 billion envelopes per year—nearly all of which are transported in traditional corrugated cardboard packaging. This means an estimated 20,000,000 cartons are used just for moving envelopes from factories to mail fulfilment plants every year, which creates an incredible amount of cardboard waste.Heritage sought to remedy this waste with the introduction of PackMail, an innovative solution that has earned them honorable mention in the 2017 Sustainability Excellence Award competition.