The Protein Sport Shaker Bottle is made in the USA and is 100% leak-proof. It uses patented ProBlend technology, harnessing the power of kinetic energy for superior performance. Studies show that kinetic-based mixing elements, which blend against the flow of material, provide a more effective and smoother mix than shakers with free-moving elements that simply flow with the material. The shaker features a screw-on cap with a convenient carry handle and a lid that snaps tightly to secure the contents. It's a great giveaway item for outdoor events, sports activities, gyms, personal trainers, and more. Please note: item components are packaged separately, and assembly is required.