Our stainless steel protein shaker bottle is exactly what you need to keep your morning smoothies and post workout shake nice and cool. They're BPA free, leak proof, easy to clean and have a grid built into the underside of the lid for smooth mixing. They're matte black so they look pretty slick, but what you'll really appreciate is their high build quality. Why continue to use a plastic protein shaker bottle that is decaying at the bottom of your gym bag? Even if protein shakes aren't your thing, use it as a water bottle, refill as you go and enjoy!