What is the unhealthiest soda? 30 Worst Sodas That Are Never Worth Drinking Mello Yello. Mug Cream Soda. Fanta Mango. Fanta Pineapple. Sunkist Fruit Punch. Crush Peach. Sunkist Pineapple. Crush Pineapple. Is Mountain Dew worse than coke? Coca-Cola is therefore six times more acidic than Mountain Dew. The tooth soaked …