Description: When pour water in it, the glass will sensor it and light up for several colors. You will see the fascinating effect. Pretty awesome and eye-catching. Features: Made of acrylic material, environmental protection, non-toxic and durable. It is a water bottle at the same time can also be used as a decorative vase. Inductive light, when the cup is filled with liquid, the LED light will turn on automatically. Clear transparent with unique pattern design, make the light more beautiful and charming. Dreamy light, full of style and add lively atmosphere. Suitable for bars, discos, specialty restaurants, party. Specifications: Condition: 100% Brand New Material: Acrylic Cup Color: Clear Capacity: 285ml Battery: 2 * CR2025 battery (Not Included ) Cup Size: Approx. 78 * 96mm / 3.1 * 3.8inch Package Weight: Approx. 133g Package Included: 1 * Flashing Cup Attention: 1. Need to add water to light. 2. Can not be poured into more than 80 degrees of boiling water directly. Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.