Infyniti | 11" Double Perc Glass Bubbler BongNot one, but two filters for double the smoothness! The Infyniti 11 Inch Double Perc Glass Bubbler Bong is made from top notch 5 mm thick borosilicate glass. The 2. 5" primary chamber features dual 8 12 arm percolators for maximum coolness. Not only do double bubblers have a killer look, but they also make tokes smoother. The colored 4. 5" round base adds balance and style to these bad boys. And don't forget the thick bowl in matching color it's the