James,
In addition to the two you've identified, I would suggest emphasis on a third which is appropriate labeling. We clearly list on signage outside our labs no food or drink are allowed (we are a tobacco free campus so we don't list that anymore). We have an exception for a human physiology lab, were there are no hazardous chemicals, in which we allow human subjects to consume food or drinks as prescribed in the research protocols. Inside our labs we also label all refrigerators, microwaves, ice flakers, etc. with "no food storage" or "not for human consumption" or similar wording. Alternately, we do provide designated refrigerators and microwaves outside the lab for storing and preparing lunches. Finally we encourage, although it could probably use more enforcement, labeling food items used for lab experiments "not for human consumption."
I will reinforce the separate office areas...since moving to a new research building where everyone, especially graduate students, has designated office space outside the lab, it has been much easier to enforce rules prohibiting food and drink in the lab.
Jeff
