Contigo Shake and Go Fit Mixer Bottle with Protein Compartment: The rounded bottom and weighted shaker ball let you enjoy smooth, delicious shakes, while the storage container in the base holds up to 2 servings of protein powder.
What caught my eye was the bright color of the bottle. its great that it has a protein compartment when needed but also you can travel with out it. The plastic is sturdy and the cap seals perfectly. The shaker ball is great in dissolving the protein when mixed.