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What is USN Shaker Blue Create smooth, lump-free protein shakes easily and in seconds with the USN protein shaker. Its design encourages a vortex with the mixture inside while you shake, helping you make simple work of protein powders and gym supplements in less time than in a blender. Its BPA free and easy to clean by hand or in the dishwasher. Its a must-have in any gym bag. This 700 ml shaker has plenty of space for larger protein shakes and also has measurements along both sides. Warnings Precautions to consider before using USN Shaker Blue Always read the packaging Warnings