It was a very busy evening and I need some water to keep myself hydrated for the next few hours. Since I was stuck at my faculty due to the heavy downpour outside, I decided to walk down the stairs to the Lower Ground Floor to buy a can of 7 Up which will only cost me RM1. It does not just save my money, but it is also saving my time from walking to Student Pavilion to buy drinks that will cost me more than RM1. Upon arriving in front of the vending machine, the button on the display rack showed green outline light for all cans. The light indicates the availability of the can and green means the can is available. So, I took out my RM1 note from my purse and insert it inside the money slot. The machine gave me a sound to tell me that my money is accepted and the button beamed in full green. I immediately pushed the button below the 7 Up can’s display and the machine gave me another sound that indicates the 7 Up can already be picked up from the lower part of the machine. This case study can be related to one of the fundamental design principles which are Signifiers.