Material: made of high quality durable 304(18/8) stainless steel, no residual taste, exquisite workmanship, safe to use and easy to clean. Easy to use for both beginners and experienced bartenders, a must-have shaker kit for professional bartenders and home lovers to make all kinds Unique design:this jigger is the dual volume jigger that provides efficiency and accuracy when dispensing spirits and alcohol for bars and clubs. Double-sided design, can be used as both drinking and measuring tool Accuracy:the small cup has a capacity of 15ml/30ml . The big cup holds up to 25ml/50ml.