Periwinkle Shimmer Protour Top Stanley 40 ounce. NEW. The ionic Quencher, now with the leakproof ProTour Flip Straw lid. The quencher ProTour Flip Straw Tumbler makes hydration simple - flip up the built-in straw to sip, then snap it shut when you're done. Your water stays ice cold for hours, thanks to double- wal vacuum insulation. It's ready to grab by the comfort-grip handle and fits in your car's cupholder.