Excerpt: In our quest for the perfect on-the-go protein solution, we tested the 2 Pack Protein Shaker Bottle up to 28oz, featuring leak-proof designs and two shaker balls. We were impressed by how effortlessly our whey and pre-workout powders mixed, thanks to the powerful chrome steelball inside. The 28oz size strikes the ideal balance between portability and capacity—ample for our daily protein shakes or post-workout recovery blends. Each bottle is a nifty 2-pack, ensuring we never run out of options. The leak-proof sealsstood up to our rigorous testing, even during intense rides. While the shaker balls may sometimes struggle with ultra-thick mixtures, they perform admirably for most protein types. Overall, this Portable Pre-Workout Whey Protein Shaker is a solid contender in our Shaker Showdown, offering convenience without compromising on performance.