The ACTIV collection shakers from Performa? feature all the same incredible benefits you loved from the classic PerfectShaker, including being shatter resistant and BPA free. The ACTIV shaker cups also uses the same patented ActionRod technology for mixing that has sold millions of the shakers around the globe. 100% leak free guarantee on Performa? Shakers Provides action rod technology to optimize mixing ability Provides duplex shatter resistant plastic to ensure shock absorption Dishwasher safe 100% leak free guarantee on Performa? Shakers Provides action rod technology to optimize mixing ability Provides duplex shatter resistant plastic to ensure shock absorption Dishwasher safe