This is the biggest order since Tesla CEO Elon Musk unveiled the heavy-duty semi-truck in a splashy event Nov. 16 outside of Los Angeles. PepsiCo joins a growing list of companies, including Walmart, J.B. Hunt Transport Services, and Michigan-based grocery chain Meijer that have pre-ordered the semi-truck. Musk said during an unveiling of the truck that reserving a Semi costs $5,000. - FORTUNE.com For Pepsi to reserve 100 semis would have been $500,000 dollars. Not exactly free publicity.