The Strong Stainless Steel Shaker from Mark Bell Slingshot is the perfect tool for any fitness enthusiast. It's constructed from high-quality steel and features a double walled vacuum-insulated design that will keep your drinks cold for up to 24 hours. The leak-proof lid provides an airtight seal and the extra-wide mouth makes it easy to add ingredients. With its stylish and modern design, this shaker is sure to stand out in any gym.