100% LEAKPROOF FOR BUMPY COMMUTES AND OFF-ROADING EXCURSIONS. When you’re out for hours on end, you need a vessel that can hold more than its fair share. Cue the Rambler® 18 oz. Bottle — the answer to your on-the-go hot drink needs. Fill it up with piping-hot coffee when you're pulling a double or have plenty of tea for that extra-long commute. And to top it all off, this supremely insulated bottle is paired with our 360º HotShot™ Cap. Designed with travelers in mind, the lid is 100% leakproof and fully rotational, so caffeine-driven riders can sip from any side.