Transport: A loop or handle to carry the bottle to and from the gym always comes in handy.Clumps: Although clumping can vary based on protein powder used, we expect a high quality blender ball or blending mechanism in the shaker to do its job.
Seals and caps: We looked for tight seals that prevent leaks, and bottles that provided a back-up locking system just in case.All plastic shakers must be BPA-free, and glass shaker bottles were required to have adequate padding wrapped around them. Materials: We favored durable products made from stainless steel.In our tests, we analyzed several factors including:
In order to spare you the frustration of having a faulty shaker bottle open up in your gym bag, fitness experts in the Good Housekeeping Wellness Lab tested over 20 shakers to find the best of the best.
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