I work in a level 2 trauma center where we have "Trauma Trays." This is a 1x1.5 feet and 6 inch deep tray that has a divider in the middle. We put cold packs with the cold products on one side and room temp packs with the room temperature products on the other side. We have a timer that we set when the tray leaves the department so that whoever has the tray knows that the products have to be returned to be stored at proper temperature. We also have a tray check off list to keep track ofwhat products need to be in the next tray. So, we are constantly feeling up one tray while the other is being used and the person picking up is usually back by the time we get it full.