Review on Contigo Shake Shaker Bottle Electric by Matthew Bahri

I have about 4 of these Contigo cocktail bottles and will continue to buy this brand. The powder mixes very well with a heavy ball and a rounded bottom (which prevents the protein powder from sticking to the bottom). I find it blends better than any other brand I've tried. No leaks or crashes yet. I also like the loop on the lid that allows me to easily attach the bottle to my backpack with a carabiner.