This is the poster my partner and I created for our chemistry class. You can find her blog here.
Our lab safety rule was: No eating, drinking, or cosmetics in the lab. This rule is important because when working with dangerous chemicals, it is dangerous to eat or drink food left out. Chemicals can easily get into the food or drinks which could be very poisonous. It is also not safe to wear cosmetics in the lab, such as contacts, because airborne chemicals can cause the contacts to stick to your eyes.