Turn your Rambler Bottle into the perfectly insulated flask with the versatile YETI Rambler Bottle 5 oz Cup Cap. Purposefully designed to save space in your pack whilst elevating your outdoor coffee or tea ritual, this heat-locking, two-in-one companion offers twice the functionality of a standard lid. Not only is it fully compatible with every single bottle in the YETI Rambler lineup, but it also effortlessly transforms your existing travel vessel into a classic, sharing-style thermos flask. As an insulated cap, it creates an airtight, leakproof seal that helps lock in the optimal temperature of your morning coffee, loose-leaf tea, or evening whiskey. When you are ready to relax and take a break, simply twist it off to reveal a double-wall vacuum insulated 5 oz (148 ml) drinking cup. The advanced thermal construction ensures your poured beverage stays pleasantly warm or icy cold whilst keeping the exterior completely safe and comfortable to hold. For maximum convenience on the move, the cap is incredibly tough, shatter-resistant, and entirely dishwasher safe. Please note that the Rambler Bottle Cup Cap is not suitable for use with carbonated beverages, or for the storage of food or perishables. Features: Clever two-in-one design transforms your standard Rambler into a traditional vacuum flask Integrated 5 oz (148 ml) cup utilizes double-wall vacuum insulation to protect hands from heat Universal compatibility allows the cap to fit seamlessly onto every size of YETI Rambler Bottle Heat-locking technology works to maintain optimal internal drink temperatures for hours 100% leakproof seal guarantees total confidence when packing it amongst expensive outdoor gear Rugged, impact-resistant construction easily survives accidental drops on rocky, uneven trails Entirely dishwasher safe components ensure quick, simple, and thorough cleaning between trips Crafted from premium, food-safe materials that completely preserve the natural flavor of your drinks