Awesome experiment

My class has been talking about brands and Mr Spice suggested to us that certain brands can make some people behave differently. He used the example of two different kinds of milk and how some people thought one tasted better than the other. So today we put that to the test and Mr Spice poured a small bit of Coke in one cup marked 'cup B' and a small bit of Pepsi in a cup marked 'cup A'. We did not know which one and had to guess the one that the coke was in. Easy right?
Well, we tallied up all the results and 20 out of our 28 us got it wrong! We couldn't tell at all and realised that maybe there is more to a product than what we think.