This Prism Halo Tie Dye Double Stack Modular Bong is perfect for those who love the 70s vibes, tie - dye patterns, or need a bong that's easy to transport and clean. You can use it at home during a chill evening or when you're out with friends. It stands 20 inches tall and has an 18.8mm female joint. It also comes with useful accessories like a downstem and an herb bowl.