The Glycerin Coil Inline Bong shows just how much a basic upgrade can totally transform your smoking experience! This piece has a clean design with white accents, and is made with super durable borosilicate glass. Rather than a regular neck, this bong has a detachable glycerin tube with a winding coil, allowing it to be easily removed and pit into the freezer to chill. As you take a hit, smoke is thoroughly filtered through heavily-slitted inline perc in the pill-shaped chamber. As pre-cooled smoke passes up through the coil, it receives maximum surface area exposure to the icy glycerin, further decreasing the temperature and making for some of the smoothest hits you’ll experience.