 Alright, so this is the Sour Glass Glycerin Tube. It has a nice bubble base and an ice bench. It's a pretty thick water pipe. It's got an 18mm removable downstem and a 14mm bowl. It also comes with a really nice little kit clip to make sure that all your parts stay on nice and snug. The really neat feature about this piece that not a lot of other ones have is it has a removable drain cap on the back. A lot of people use these caps to fill their pieces with vegetable glycerin. Vegetable glycerin is a natural type of oily substance that you can put in the freezer and it cools down to extreme temperatures to help cool your smoke during your smoking process. You can also fill this chamber just about with anything you want from colored water to any liquid of your choice. So that is the Sour Glycerin Tube.