The Liquid Freezer Downstem from Weed Star is filled with brightly-colored non-freezing liquid and looks awesome with any bong! Green liquid is pictured here but the color you receive may vary. It serves as an adapter for any 18.8mm joint bong, allowing you to use 14.5mm bowls, ashcatchers or other accessories. Just place the downtube in the freezer before use and then get ready for icy cool, bubbly hits! Make sure not to leave the downtube in the freezer for more than 15 minutes as there is danger of glass breakage. We stock this downtube in either 12.5cm (4.9 inches) or 13cm (5.1 inches) lengths, so please choose from the drop down menu when ordering.