$25 off orders over $79 + free shipping with rebate. Promo code: SPRING25The Rechargeable Vortex Mixer is the portable solution for mixing and enjoying your own protein shakes, diet drinks and other beverages in just 5 seconds. It features a 20-oz. Tritan plastic tumbler, with a powerful cordless mixing base that blends ingredients faster and better than a shaker bottle ever could. Features a leakproof sport lid and a built-in USB port to charge your phone or tablet.