Like Sue, I have a travel kit. Mine includes a collapsible bowl for soaking, a folding baby bottle dryer rack and my Trek S nebulizer. I take 2 nebulizer cups. Use one in the morning and then toss it into a baggie in your kit and go. When you arrive at your destination, wash and sterilize the cup you used that morning and let it dry overnight. Use the other cup for your evening nebulizing and wash/sterilize that cup and let it dry overnight too. The next morning, you have 2 clean cups. One to use immediately and one to use later. Be sure to label your baggies -clean vs dirty.