Screw top shaker, brought to you by Reflex Nutrition The shaker bottles are absolutely leak proof no matter if the drinks are based on water or milk, and are made out of high quality raw material that complies with all requirements regarding food contact. This 700ml shaker has mesh inside to help mix products effectively. Screw top shaker, brought to you by Reflex Nutrition The shaker bottles are absolutely leak proof no matter if the drinks are based on water or milk, and are made out of high quality raw material that complies with all requirements regarding food contact. This 700ml shaker has mesh inside to help mix products effectively.