BlenderBottle Equinox trainer and founder of #irockthesportsbra Sylvia Nasser's choice: the BlenderBottle Just For Fun Classic 28 Ounce Shaker Bottle ($15). She uses it for pre-workout or BCAA-supplement drinks and refills it with water to stay hydrated. "I never leave home without it," she said. Image Source: amazon.com BlenderBottle Just For Fun Classic 28 Ounce Shaker Bottle $15 from amazon.com Buy Now