High-quality materials: Made from stainless steel, and solid. free. Doubled-ended alcohol measure: One side measures single (25 ml), the other doubles (50 ml). Specific Design: Designed for speed and quality, this jigger is one of the most common jigger styles behind craft bars today. Accurate measurement: Double-Sided Jigger is very suitable for measuring alcohol with using either the 25ml and the 50ml side. Easy to clean: Smooth edges for easy cleaning. (Please do not use abrasive cleanser).