Perfect Shaker's Activ Shaker Bottles are 100% leak-free with a screw on lid and ActionRod Technology for a smooth mix every time. Made of Duraplex shatter resistant plastic with an integrated handle for easy carrying. Perfect Shaker's mission is to create enthusiasm for building a healthy lifestyle. Large 48 ounce bottle. 100% leak free. Screw on lid. Duraplex shatter resistant plastic. ActionRod Technology for smooth mixes. Integrated carry handle. BPA-Free. Hand wash only.