this leak-proof protein shaker bottle will prevent spills on your countertops and sinks. No mess, minimal clean-up, and you’re ready to get on with your workout at your gym or in the basement with the free-weights. Each one of these shaker bottles for protein mixes comes with a stainless steel shaker ball, so there’s no grit or lumps in your shake. Just like drinking a smoothie only your protein powder may help repair and rebuild your muscles.