The wide Shaker top unscrews for adding a range of ingredients like oil, vinegar, mayonnaise, mustard, garlic, onions and spices. Cup, millilitre and ounce markings are printed on the side for easy measuring. Once ingredients are added, simply screw the top closed and shake the watertight container to quickly mix. Flip the top lever back to pour and forward to seal. The 1.5-cup-capacity Shaker is dishwasher safe, highly durable and BPA free.