Improved design. New manufacturing process. Fully injection moulded in the USA for a clean and precise finished product. Helimix uses an innovative patented design to ensure that every athlete's sports drink blends easily. The shape of the cup itself makes the mix and it works much better than you think. Forget the days of cleaning shaker balls, whisk balls, and screens, trying to unravel them from the dishwasher basket, lose them in your cabinets, or replace batteries. The Helimix tumbler only requires the cup, lid and supplement mix of your choice to work. We know that you put a lot of work into every gym, game and competition session, so we want to eliminate everything in your path to domination. The Helimix blender cup uses shatterproof, odor resistant, 100% BPA/BPS free Copolyester plastic to give you a clean, USA made, durable and easy to wash shaker bottle.