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 the Rambler Bottles its compatible with all of em. But if you ask us, the 12 oz. is the perfect size for it.