On-the-go caffeine enthusiasts meet the insulated, 360-drinking, 100% leakproof cap ideal for morning commutes, cold-weather hunts, night shifts, and beyond. With just a half twist and a click, you can sip from any side and enjoy that perfect, piping-hot temp. And as an added bonus, you can put the HotShot Cap on any of our Rambler Bottles ? it?s compatible with all of ?em. But if you ask us, the 12 oz. is the perfect size for it.