Awhile back I posted a topic about laundry soap leaves made by Travelon. TSA compliant and come in a packet of 50 leaves (use 4-5 per sink load). The problem I had with them was that they had a heavy potpourri type scent--not appealing to many men.
Well, I just found another brand of the same type of leaves at REI. They have a what is described as a "green tea" scnet although I can hardly smell anything at all. I tried them and they are not bad.
Pocket Laundry Wash by Sea to Summit. They come in a yellow transparent plastic container about the size of a pack of matches. I tried them and they are not bad. Don't have to put them in the 3-1-1 bag either.
They also come in soap, body soap, shampoo and shave cream varieties.