Made to enhance the experience and results of SD1 & SD1R. Precisely engineered collar allows SD1 & SD1R to sit perfectly flat, ensuring both functional alignment and aesthetic appeal. Narrow neck helps to concentrate and intensify aroma. Wide base with indentation allows for better aeration and enhanced aromatics. The indentation, with its specific height also helps form laminar flow, which preserves most of the volatile compounds in the beverage, thereby increasing the aromatics and vibrancy.