Bests & Worsts Reviews from Amazon

So, clearly I'm not a weightlifter or trying to bulk up by drinking protein shakes, but I am using them as a way to increase my daily caloric intake. In the video, I am using a whey protein powder and skim milk. When I ordered my first jar of protein powder, I almost bought this bottle as well, but then I figured I really didn't need it. I thought I'd just empty out a water bottle and shake it in there, or stir it in a glass. By the 2nd shake I made, with mouthfuls of powdery lumps, I decided it was something I should invest in - and really- not much of an investment at that- only $7. and change. I honestly never thought that the shakes would have been that difficult to mix, so as to justify the purchase of a special type of bottle, but I was quite wrong. Who knew? Well, not me, apparrantly. Anyway, it does exactly what it claims to do, and it does it very well. All of the shakes I've made have been consistently smooth, and I have not seen any leakage from any part of the bottle. It is actually very well made, and the flip top lid is very tight and secure. That little metal ball really does make a huge difference in how the shake turns out. It's a time saver as well-very quick. No buyer's remorse; received the item on time, total A+++ purchase. Highly recommend for mixing any type of powdered drink.