Use them all the time, just make sure they have a good seal. Give it a good wash then dusting with baking soda to get rid of the smells. If you plan to bring a traveldor when you fly you will need a vent of some sort, The change in air pressure will make it almost impossible to open. I prefer the inexpensive rugged duty boxes at Harbor Freight. They have foam inserts, good quality latches and screw vent. Catch them on sale