From delivery to take-out to packaging customer leftovers, styrofoam boxes are an integral part of food transportation for many. As part of environmentally-friendly initiatives, many large cities are choosing to ban the use of foam containers altogether.
Some commercial kitchens use color-coded cutting boards, utensils, and containers for different items. You may want to adopt this practice as well to keep staff from accidentally using the same tools for different food items. The sanitation team also plays a huge part in preventing contamination since clean and sanitized surfaces are important to keep different types of food from coming in contact with one another.