Leak Proof Black Stainless Steel Cocktail Shaker - 18oz Single Drink Size - Professional Grade Barware - Hand Inspected in USA for Quality Leak Free- This cocktail shaker addresses the #1 problem with shakers, LEAKS! Our seal is precision milled in order to prevent leaks. Hand Inspected- Each unit is hand inspected in the USA. You will notice each box is sealed and signed and dated by the inspector who checked the shaker. This allows us to provide the customer with only the best quality products possible. Thick Steel Walls- Walls of the shaker are slightly thicker than normal to increase durability and ensure proper seal. 18oz Capacity- Ideal capacity to mix single drinks or multiple shots. Slightly smaller than traditional shakers. Just right for personal use drink mixing. Better Grip- Traditional stainless steel finishes can be slippery when cold or wet. The brushed black cocktail shaker finish allows for better grip versus normal stainless steel shakers.