10K views · 289 reactions | Fluid dynamics is the name of the game. On the K11, the angled section is shorter than other "vortex" style models. This is a purposeful design choice in order to keep all the material closer to the middle of the body, rather than into the neck. This leads to greater efficiency, and less material wasted. -K11 -PukinBeagle Diamond Dogwhistle | victory_glassworks | Facebook