60 OZ is the recommended minimum but since the MC is NOT weight loss diet it does not work by the restriction of calories.If your question is in that vein. Most toxins are stored in fat and that is how cleansing works regarding weight loss. The more you restrict calories the slower the metabolism gets and the slower one looses weight.
The Ice cubes thing is great as an "occasional" treat in the summer and also you can make slushies in a blender