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If you’ve ever opened a gym bag to find protein powder caked in every zipper, or drunk a chalky shake that tastes like yesterday’s workout — you already know why the right shaker bottle matters more than the protein powder you put in it. After testing 9 different shaker bottles over 5 months of daily gym use, here’s what actually mixes well, what leaks, and which one is worth the upgrade.
The Mixing Test: 30-Second Smooth vs 2-Minute Lumpy
Can I put carbonated drinks in it?
Is it safe for hot drinks like coffee?
How do I clean the lid?
Can I use it for hot coffee or just cold?
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