The Holographic Rainbow Twist Bong 14" is made of 50x7mm borosilicate glass and has a beautiful holographic rainbow base. It includes a standard 14mm bowl, which is compatible with most bangers and easy to clean. The bong's unique design makes it a great collector's piece or gift for those who appreciate aesthetics and love colorful items. It is a high-quality bong that provides a smooth smoking experience and adds beauty to any smoking setup.