Up for your consideration are:

2 Bath & Body Works Black Amethyst Foaming Body Wash. They are both six ounce each but from my experience with this product on the ones I have used they last as long as most 16 ounce body wash bottles.

It is a high-foaming and oil free product that nourishes and soothes skin with Apple and Oat extracts so it feels soft conditioned and ultra-pampered.Smooth over skin and enjoy the fragrance of Black Amethyst, a hypnotic scent inspired by chic, sensual and confident woman.