This leakproof coffee mug keeps your drinks hot for 4 hours and cold for 6 hours. The double-wall vacuum insulation process allows this coffee cup to be lightweight without compromising hot or cold retention or product durability. Stanley thermos flasks are built to support you from morning to evening, keeping your tea hot in the morning and water cold in the evening. This sustainable travel cup eliminates the need for single-use disposables and uses increased recycled content materials. It features a spill proof drink-through lid that locks securely, giving you confidence to carry it in your bag without spills. Push the lid up and lock it down to sip, then lock it closed again. This vacuum bottle is designed for easy cleaning and is completely dishwasher safe. Every piece of this stainless steel vacuum bottle is dishwasher safe. Stanley products are built to last a lifetime and are backed by a lifetime warranty, ensuring they endure in your outside world, delivering innovation for keeping food and drink at the ideal temperature.