Blender Bottle Sportmixer More of the classic shaker bottle design, the Blender Bottle Sportmixer ($13) has a large, spherical spring that pulverizes every powder I put in the bottle. As someone with butterfingers, the textured centre is my favourite feature. I'm able to grip the bottle in a way that allows me to not worry about it slipping from my hands when I shake it. Image Source: amazon.com Blender Bottle Sportmixer $13 from amazon.com Buy Now