I think the best way I have ever used them is by refilling them with my own homemade laundry soap.
Homemade Liquid Laundry Soap
1 Large cooking pot and stir stick
4 gallons of water
1 Bath size bar of Ivory soap (grated)
1 cup of 20 Mule Team Borax
Container/s to hold 4 gallons of soap
Grate Ivory and put in pot with one third the water< melt down<turn off heat< add Borax and stir< add rest of water < cool before you fill laundry bottles.
Will thicken up when cooled. Use one half cup or more for each load of laundry.
Also, I delute my Downey fabric softener in half and get twice as much for my money (well hubbies money lol ).
I make 27 gallons at a time and have for over a year. I'll NEVER buy laundry soap again.
spacedup in IN..