1. Color-changing cups: Simply add cold water or iced drinks to these plastic cold drink cups, and you'll find that they'll change color in an interesting way. When the temperature is low and below 53 degrees Fahrenheit, the cups will automatically change color. 2. Suitable for children to hold and an excellent choice for personalized gifts: The size of the color-changing cups is most suitable for children and small hands to hold. It is also the best gift for toddlers, and you can customize the cups by pasting adhesive films. 3. Convenient for travel with a splash-proof design: These reusable cups come with lids and straws, are stackable and not easily breakable. The splash-proof lids help reduce spills. So they are very convenient to carry and store when you go on vacation. 4. Safe in quality and easy to clean: The 12-ounce reusable bulk cups are made of safe and high-quality materials and are free of BPA. The cups for children are also very easy to clean after use, which is both safe and convenient. 5. Ten fun-colored cups for sharing: The plastic drink cups with lids and straws are very suitable for family gatherings, barbecues, home use, and summer beach vacations. You can take them with you when having outdoor activities with your family and friends, and your friends will think they are cool and interesting.