This dome lid is made from clear, durable PET plastic designed to fit 9oz squat and 12oz tall PET cups. It features impeccable clarity to easily view contents and is odor and flavor resistant to preserve the original taste of beverages. The lid is freeze, heat, and crack-resistant, providing a tight seal on compatible cups. Its transparent material locks in flavor while maintaining durability for various temperature applications. The lid is suitable for securely topping PET cups in foodservice or retail settings where maintaining beverage quality is important, available in a case of 1000.