These bold, colorful 30 oz flip straw tumblers are made to keep you hydrated in a fully functional style.  Ideal for car commutes or workouts at home, it has a built-in flip straw for easy and effortless sipping.  Snap it shut and the double-wall vacuum insulation will keep your drink extra cold for hours.  It fits comfortably in you golf cart's cup holder, and the folding handle lets you quickly grab and go.