Shaker bottles are a necessity for fitness aficionados and folks who love concocting protein shakes, smoothies, or any portable beverage. They are crafted to efficiently blend elements ...

That's a total of 4 ounces per drink. In our 28-ounce shaker, two drinks (totaling 8 ounces) fit quite comfortably, with plenty of room to shake. Three drinks (12 ounces) get a bit tighter ...