Foaming handsoap cubes are the easiest way to refill your hand soap bottle. Simple pop a cube out of the pack and drop it in a 3/4 filled foaming bottle of water. Allow it to dissolve, then fill rest of bottle with water and gently shake afterwards. They cost less and great for the environment with less empty bottles to throw away 6 cubes in a pack. Each cube is enough for an 8 to 10 oz bottle.
Foaming hand soap cubes