Made with high grade, heat and cold-resistant silicone. able to withstand 480F down to -40F. Easy to pour and narrow flexible spout fits in most jars. Collapsible accordion pleats ensure flatten for compact storage. Measures 5.25 inches in diameter, 4.5 inches long when unfolded. Ideal for small to medium sized containers. Dishwasher safe. Place securely in dishwasher securely for easy cleaning.