Why choose FitAFs protein shaker? FitAF Steel Shaker Comes With Leak Proof Cap, Rounded Corners For Easy Cleaning, 500ml Capacity, 100% Leak Proof Guarantee, 100% Stainless Steel. Usage Take your protein shaker and remove the lid.Add around 200ml of water or milk to your shaker first. Add your favourite FitAF dose of protein powder. Give the whole thing a vigorous shake.Once shaken, consume immediately.