Shake Up Your Fitness Routine. The most innovative gym shaker ever made. The MultiShaker is packed with features; from its MagFlip™ lid and a removable agitator that doubles as an infuser, to its easy carry handle and non-slip base, the attention to detail makes this not only the most unique shaker in existence but also the first multifunctional shaker that can go from gym bottle to travel mug with a quick switch of the lid while keeping your favorite pre-workout, smoothies, or infusions ice-cold until the last drop.