1. Color-changing cups: By adding cold water or iced drinks to these plastic cold drink cups, one may notice that they change color in an interesting manner. When the temperature is low, specifically below 53 degrees Fahrenheit, the cups will change color automatically. 2. Suitable for children to hold and a good choice for personalized gifts: The size of the color-changing cups is quite suitable for children and small hands to hold. It is also a nice gift for toddlers, and the cups can be customized by pasting adhesive films. 3. Convenient for travel with a splash-proof design: These reusable cups come with lids and straws, can be stacked, and are not easily breakable. The splash-proof lids help reduce the likelihood of spills. So they are relatively convenient to carry and store when going on vacation. 4. Safe in quality and easy to clean: The 12 - ounce reusable bulk cups are made of safe materials and are free of BPA. The cups for children are also fairly 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 well - suited for family gatherings, barbecues, home use, and summer beach vacations. One can take them along when having outdoor activities with family and friends, and friends may think they are cool and interesting.