Take a PEEK at the all NEW Periwinkle Bong! These 8-inch beaker-style bongs are highly colorful and contain TWO levels of filtration power. After smoke moves through the main water chamber, it moves upwards and is percolated through a chamber half-way up the piece. With the double percolation power and a dual bowl/downstem, the Periwinkle Bong is incredibly easy to clear.