i use the medela breast pump sterilization bags...you can get them at target and one can be used up to 20 times. just follow the directions, all you need is a microwave. so, when we travel i always make sure our room has a microwave in it. our cf clinic at hopkins said the medela bags are also ok for everyday sterilization use. (i think there are also a kind of disposible neb you can buy, but they would probably be alot more expensive than puchasing the steam bags) <img src="i/expressions/face-icon-small-smile.gif" border="0">