The blender ball breaks up my protein powder completely in about ten seconds of shaking, no clumps left at the bottom. Lid stays totally dry in my bag even when I forget to check it before tossing it upside down. This is the third shaker I've owned and easily the most reliable one so far.
Finally a shaker I can toss in my gym bag without worrying about a mess—the leak-proof lid seals tight every single time. The blender ball breaks up even the clumpiest powder with just a few shakes, and clean-up is a breeze. This one’s earned a permanent spot in my routine.