This custom-crafted glass jar is designed specifically for sourdough starters, featuring straight walls and a 700 ml capacity—just under 3 cups. Its unique lid allows airflow while preventing contaminants, ensuring an ideal environment for your starter. A rubber o-ring marks the pre-expansion level after feeding, helping you track growth with precision. Measuring 5.5 inches tall by 4 inches in diameter (with lid), this elegant jar combines functionality with refined simplicity. Starter not included.