First off I can't say enough positive things about Dankstop. They shipped my items fast and I received them in flawless condition. I also ordered a quartz hammer, bowl, and dab tool. The glass is thick and it is a quality piece. Works great with flower and concentrates. I fill with water to where it is displayed in the video and the vortex functions is great to watch. Smooth flavorful pulls and splash back is a non issue. Thanks Dankstop!!