Just pack carefully so there are enough items on the same shelf to secure against one another. One year I left liquid hand soap on the bathroom sink instead of putting it in the cabinet. Fell over and spilled everywhere. You never would have thought soap would be so hard to clean up. Big slippery mess. The floor was clean though. Now I remember to put it back in the cabinet. Our cabinets are built in a way to have a lip at the bottom to keep things from falling out when you open the door. On our ACE there is a pull out drawer under the shower pan that was intended as a set of pet bowls. Since they are waterproof plastic, it's a perfect place to store bar soap and shampoo.