I use these in a commercial bar as a visual aesthetic for cocktails; customers love them. The LEDs light up the drink and ice and cast a nice light effect along the bartop from the sides.The electronics are molded into the resin, making them resilient to water spills. The on/off switch is activated by the heat of your finger, providing a streamlined design in which a small charging port is the only exposed component. The port is securely set within the resin and appears durable for long-term use.Overall, this is a unique product. Most illuminated costers on the market are cheaply built, but this product's price justifies itself if you want something of higher quality.