Shaker białkowy Rally

The twist-on lid is the first thing I tested, and it’s genuinely leakproof even after tossing it in my gym bag upside down. The pop-open spout makes sipping mid-workout feel smooth, and the soft handle loop is a nice touch for carrying it around.

The contoured shape really does make one-handed shaking easy without it slipping, and the spout pops open smoothly mid-workout. Finally a shaker that doesn't dribble down my chin or leak in my bag after a hard session.

The twist-on lid with the handle loop is convenient for carrying, but I’ve found the spout pops open a bit too easily in my bag, which is annoying. It’s decent for one-handed use with the contoured grip, though the leakproof claim hasn’t held up perfectly for me.