These sodas should also be different colors. This will make it LOOK like orange soda, but of course, it will NOT have any taste. Pour the 5 drinks into different cups for taste testers. Ask people to tell you what each drink tastes like. Food companies add color to food to influence what it tastes like.
People like to see foods in colors that they expect.
In this experiment, use jelly beans instead of soda. For each subject you test, you will need pairs of jelly beans. Label small container or napkins with the numbers 1 through 4. Place the jelly beans from the first group into a container or on a napkin - one jelly bean into each container or on a napkin. Wrap the jelly beans in the second group in foil or place them in a cup so that you subjects cannot see them.