This is a color changing cup. Once you fill the cups with your or your kids' favorite iced beverage, mesmerizing color changing will happen in these cups. These aluminum cups are available in 4 colors. These color changing cups are made of high-quality aluminum materials that can be reused, are durable, and lightweight. If you are worried about breaking glasses and ceramic mugs, you can choose our aluminum cold-drink cups. Aluminum color-changing cups conduct heat very well, so please be careful not to fill them with too hot water. These metal cups are perfect for summer parties, pool parties, and children's birthday parties to ensure a happy party atmosphere for your family or friends! They can be stacked together to save space and take up less space in the cabinet or picnic basket. These drinking cups are perfect for all beverages and are suitable for kids and adults. Use these cups for juices, milk, milkshakes, smoothies, iced coffee, beer, and iced tea. The colorful appearance of the aluminum color-changing cups is the highlight of family wine parties, friends' parties, and children's parties. Cups can also be customized with logos for thoughtful holiday or birthday gifts for your loved ones, and cups are perfect for almost any party and occasion.