The purpose of my science fair project is to determine whether Dr. Pepper or Diet Coke makes the largest fountain. Everyone buys Diet Coke when they want to create a pop and Mentos fountain. I wanted to see if another type of pop, specifically Dr. Pepper, would create a larger fountain than Diet Coke. Teenagers who are creating a pop and Mentos fountain want the biggest fountain possible and don’t want to spend their money on pop which will not produce a large fountain. The results of this project will show these teenagers the pop to buy in order to achieve that goal.