The Double-Wall 18oz. Ninja To-Go Tumbler is designed for both hot and iced Ninja Coffee Bar coffee; the double wall design keeps iced coffee colder longer and hot coffee hotter longer while reducing condensation! With it's Sip & Straw Ninja Lid you can drink directly from the lid or pop in the straw for your iced coffee! Double Wall Design - keeps iced coffee colder longer and hot coffee hotter longer while reducing condensation! Your Commuter Companion - Tapered design Fits in Most Car Cupholders. Fits perfectly under your Ninja (R) Coffee Bar - Brew direvty in the To-Go Tumbler for ultimate convenience. Compatible with 2 lids - Sip & Straw Lid for drinking directly from the lid or from straw PLUS shaker Lid for shaking and mixing your favorite Ninja Cofee Bar Mixed Recipes. Durable - Double Wall Tritan Plastic. Dishwasher Safe & Microwave Safe.