The Ringball features a huge bubble between two much smaller bubbles; one beneath it that the downtube plunges into and one above.
G-Spot Bongs are made with the finest borosilicate glass, under the highest quality standards. Each bong is tested for minimum glass thickness before they even leave the workshop, and they are all oven-tempered to make each one a strong and tension-free bong.
There aren't many mightier bongs than this Ringball. If you do come across one even mightier, it might be wise to run away.