he Nav 35oz was made for navigating life’s adventures and is the most feature-packed travel tumblers there is. It has our 100% leakproof BevLock™ lid to seal in your beverages and stop leaks, our brand-new, OctaLock™ thread system to make taking your lid on and off a breeze, and our MagFlip™ technology to assist in keeping your lid open while you sip. Also equipped with a cupholder-friendly base, a removable, color-matched sleeve for ultimate durability, and our BevGuard™ technology to keep your drinks hot for 6+ hours or cold for 24+ hours.