1 of 1 people found the following review helpful
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This review is from: PROMiXX: The Original Vortex Mixer. World's most advanced protein shaker - BLACK (Personal Care)
Saves me a lot of shaking and wasted protein powder. If you use a conventional shaker bottle you always get powder stuck in the corners or the bottom. This mixes perfectly we not problems. Make sure you put the liquid in first then the powder. Great product, has made my life very convenient. Looking forward to the second generation model!