Because of the unique dual-compartment system, the bottle was somewhat difficult to clean. The smaller, 12-ounce side requires a long scrub brush, as our tester noted, after a failed attempt to reach in with his hand to manually clean this side of the bottle.

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Whether you're looking to gain muscle mass or need added protein in your diet, there are a lot of different uses for protein powder, says Allison Knott, MS, RDN, CSSD, a board-certified specialist in sports nutrition who guided our testers on test day. The bottle features two agitator lids that work independently to combine the powder and liquid in each compartment without any cross-mixing. Our tester found this design to be thorough and effective—giving the bottle a perfect score of 5 out of 5 for effectiveness. During our test, we liked the convenience of this electric shaker bottle. It has plastic blades that allow you to have the perfectly mixed protein shake without manually shaking it yourself. This bottle is dishwasher safe, but even if you don’t have a dishwasher, it’s super easy to clean. You just have to add soap and water and turn the mixer on. Bolde's bottle is one of the higher-priced products on our list, but for its innovative design, useful features, top-quality durability, and lifetime guarantee, we think it's well worth it—earning the bottle a perfect score of 5 out of 5 for overall value. Testing Notes: “They really thought of everything: The bottom storage, marked measurements, double-walled 36-hour insulation, and silent mixing system—you really couldn't ask for more!”The material best for you will vary based on your needs and priorities. Figueroa says, “Factors such as environmental impact, personal values, finances, and how/where a shaker bottle will be used will inform an individual’s decision on what material is best for them.” If you are purchasing a plastic bottle, make sure it’s BPA-free. BPA has been linked to a variety of health concerns, including cancer, infertility, and polycystic ovarian syndrome (PCOS). When to Use it BrüMate MultiShaker: A gunked-up shaker bottle is a smelly shaker bottle, and for that reason, this bottle did not make our list. Although this bottle's agitator is removable, we struggled with that feature, leading to powder getting caked inside the agitator, despite our tester’s attempts to thoroughly clean it. Next, each tester was instructed to sip their protein shake and pay special attention to flavor and texture: How did it taste? Was the shake clumpy or smooth? How well did the powder dissolve? We had a hard time reading the measurements on the bottle, due to the slightly curved design. And since the mixing blades are plastic, they feel a little flimsy (and we definitely don’t recommend using this shaker bottle for anything like fruit or ice).

Shaker Bottle | Device-charging Vortex Mixer Promixx Charge Shaker Bottle | Device-charging Vortex Mixer

PROMiXX’s Pro Shaker Rechargeable Bottle comes with a small compartment to store protein. This feature is perfect if you’re looking to bring pre- or post-workout powder on a walk or to the gym. Our tester appreciated this feature and the product's excellent overall design. The 6-ounce detachable bottom storage compartment, easy-to-read internal measurement markings, and snap-shut design, allow you to take your shakes on the go, worry-free. And the bottle fits into standard cup holders, which a huge plus. We also appreciate the bottom compartment for storing protein powder or other small gym essentials like headphones, hair ties, and more. But if you want to be subtle about mixing your protein shakes, this may not be the shaker bottle for you. The wire mixing ball clattering around the stainless steel bottle gets pretty noisy. Testing Notes: “It sports these nice vertical bars on the outside of the container that make it easy to grip the bottle, a nice carry loop on the lid, and BPA-free plastic.”The genius design of the PROMiXX Pro Shaker Bottle really impressed us. Not only does it come with a clever little capsule for storing protein powder, but that capsule fits neatly into the mouth of the bottle so it’s always within reach. We’d recommend this for people who want the two-in-one functionality of the Hydra Cup, but with a rechargeable blending mechanism. The blending blades also make this a snap to clean: Simply put warm water and a bit of dishwasher detergent in the cup, secure the lid, and blend as usual.