Automatic Protein ShakerThe electric shaker bottle is made of food grade Tritan, safe, and are BPA free. This material gives you the transparency of glass and the lightness of plastic. The protein shaker bottles are unique among shaker bottles with the way they have an inbuilt battery operated blender insider them. Performance vortex mixer, Just click once, say goodbye to caking and enjoy the silky texture. The electric shaker mug has a minimalist design that sets you apart.