I also use them to pack one category of clothing for everyone in the family. Use the big 2 gal. bags to put ALL the pj's for everyone and when we spend one night at the condo on the way down to WDW it's easy to grab that one bag. Same thing for all the swim suits if we want to swim on check-in or check-out day but don't have access to the room. I also like to put all the undies and socks for a trip into a single 1 gal. bag per person. As someone said it's so easy to pull it out of the suitcase and into a drawer for the duration of the trip. Plus it saves space! Our entire family of 5 can be packed into one large suitcase which I find much easier than dragging 5 different smaller suitcases/duffle bags into the resort.