Phoenix Star designs a unique freezable bong, Phoenix Star Beaker Bong 5mm Thick Freezable Coil 12 Inches PHX496. Both the downstem and the bowl are filled with medical grade glycerin. The high grade glycerin will not expand when frozen. And this glass bong is also equipped with a longer glycerin coil. You can place the freezable glycerin bong in your refrigerator for 1-2 hours or more before you start smoking. Then you can gain cooler and smoother hits. Made from premium boros glass, this glycerin coil bong comes with a height of 12 inches and a thickness of 5mm for durability. The glycerin bowl of the freezable glass bong is removable, easy to replace. 

Phoenix Star's got you covered no matter what type of pipe you prefer! For the straight tube lovers, check out the PHOENIX STAR 12 Inch Colorful Freezable Coil Straight Bong. For those who love detachable design, Freezable Glycerin Coil Beaker Bong 7mm 12 Inches is for you.