Which of these blue chip giants is a better safe haven investment?Coca-Cola (KO -0.34%) and PepsiCo (PEP 0.30%) are both considered stable blue chip consumer staples companies. Both stocks are also Dividend Kings, with more than 50-year streaks of annual dividend hikes.Over the past five years, both stocks delivered total returns of about 50% when factoring in dividend reinvestment. They're both still safe stocks to buy, hold, and forget -- but which one would be the better pick to add to your portfolio rig ...