These polypropylene beakers are reusable and are equipped with blue graduations along the side for taking legible and efficient measurements. These polypropylene beakers feature a vertical lip around the top of the beaker which helps contain spills. The vertical lip also allows the beakers to be stacked together when not in use. The lip of the beaker is designed with a small dip to help direct the flow of your product when pouring. For reference this kit contains one beaker of each of the following capacities: 250 ml, 500ml, and 1,000 ml.