For RBCs, we use unsweetened Koolaid packets and water in empty blood bags - 1 believe we use 400 ml Transfer bags. - I think we use 2 black cherry packets and one red cherry. We also used gram stain reagents in the past. We give them to RNs for training when requested,
For mock disaster drills we slit a hole in the back and insert red or yellow paper inside the empty blood bags. We store the frozen yellow bags in the freezer and set the timer for 15-20 minutes for thawing. I like the idea of thawing fake units - Lemonaid koolaid?