Takeya ThermoFlask 32-Oz. Bottle: Keep your drinks hot or cold with this bottle, which features a vacuum-insulated, double-wall design that keeps condensation off the exterior. The 18/8 stainless steel offers strength and reliability, while the leakproof lid keeps you dry.
It keeps hot water warm for about 6 hours. I would give it a four-star if it keeps warm for 8 hours, a 5-star if 10 hours. For the price, it is an OK product.