Our #1 best-selling set includes 24 reusable cups, lids, and straws in vibrant rainbow shades to mix and match. Add your favorite cold beverages and watch the colors change! FEATURES: Easy to personalize and decorate at home Stackable for easy storage Reusable and durable Splash-resistant lids Fits most cup holders Perfect for parties Capacity: 24 oz/ 710 mL CARE & USE: The color-change effect is dependent on ambient temperature. For best result, rinse cups in warm water before use. Wash before first use. Hand wash only. No abrasive cleaners. Not microwave safe. Not dishwasher safe. Always use caution when handling hot beverages.