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 Hot Shot™ Cap on any of THE Rambler Bottles - it's compatible with all of 'em. But if you ask us, the 12 oz. is the perfect size for it.