Shaken, not stirred. Our flashing martini glasses are amazing and are guaranteed to bring your next party to life. Each glass is constructed from acrylic, meaning it will not crack under pressure like others offered on the web. This amazing light up glass features a total of 3 LED lights in red, green and blue. It also features 8 different light-up modes! Every glass also comes individually packaged with batteries that are already installed. Use these flashy glasses to really add personality to your next signature drink.