The Vacu Vin Cocktail Shaker is made of heavy-duty glass with a unique silicone lid that features the patented Oxiloc system to seal the container for shaking and easy pouring. A built in strainer is made into the lid. Measurements are printed on the glass in both milliliters and fluid ounces. Capacity of 350 ml or 12 fluid ounces. Dishwasher safe.