Juicy Orange Glycerin Freezable BubblerGLYCERIN BONGS I have steadily sold bongs pipes that incorporate glycerin into their design. The premise behind the freezable bubbler, is basic; to provide an easy way to cool down the smoke for a smoother and more comfortable experience by placing the entire piece into a freezer. The glycerin and smoke do not mix, sitting in seperate paths with the smoke passing through the glycerin for cooling to occur. Once frozen it will stay quite cold for a