Britain's Prime Minister David Cameron speaks at a news conference in London on Friday after the U.K. raised its terror alert level. Paul Hackett/PA Photos/Landov hide caption

itoggle caption Paul Hackett/PA Photos/Landov

"People call Irn Bru Scotland's other national drink, after whisky," says Sara Grady, who works for a market research firm. Courtesy of Irn Bru hide caption

itoggle caption Courtesy of Irn Bru