Three University of Wisconsin-Madison students, Eric Ronning, Will Doniger and Brian Pekron have reportedly developed a static mixer with an entirely new geometry that reduces mixing shear stress. The low pressure and low shear stress static mixer can mix delicate reactants together without damage, this is especially useful when mixing long chain organic proteins and other live cells. These low shear mixers are not going to replace low cost helical static mixers as they cannot be manufactured with plastic injection molding. Each of these low shear static mixers has to be made with a 3D printer. The full news release can be found at