At the start, it was a difficult choice you weren't allowed to copy each other, as to the results of having two of the same signs which aren't really ideal. My sign was based on food since it was a prohibited sign you needed to make it obvious on what it is trying to tell you. With mandatory signs, it is fine because it still tells you what to do but with a visual image as well. A hazardous sign also needs to be obvious since it is only a picture on a yellow triangle.
Mine was "no eating or drinking in the workshop" it is obvious since it has a red angular line through it, making people see it is something not to do. It has a burger in a drink bottle as the icon in the sign, everyone has a reason why that sign. Mine was because there are different kinds of chemicals in the workshop. if you touch those chemicals and then eat there is a potential you are risking your health because once you consume the chemical you could get sick. The same goes for a drink in the class as you might spill it and someone might slip. Or chemicals could get on your drink bottle and then you would drink it.