When cold water is poured into this straw cup, it changes colour quickly. But shortly after the water is drunk, it regains its colour. As it has a colour-changing design. You can use the lidded water cup for a long time, because it is anti-slip, anti-stick, anti-corrosion, long-lasting and reusable, which is not easy to deform or break. Made of plastic, it is lightweight and durable. The water cup is available in 5 different colors. It is suitable for restaurant, dining room, school, dorm, household, etc. Item Name: Water Cup Material: Plastic Features: Lidded, Large Capacity, Food Grade Capacity: 473ml Size Details: Size: 10.5cm x 6cm x 12.5cm/4.13" x 2.36" x 4.92" (Approx.) Straw Length: 20cm/7.87" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Water Cup 1 x Straw (Others Not Included)