The RamblerA(R) 30 oz. Tumbler is your reliable companion for all-day hydration. Thanks to its double-wall vacuum insulation and rugged kitchen-grade stainless steel body, it provides maximum temperature retention, keeping drinks hot or cold for hours. Enjoy effortless cleanup since the entire RamblerA(R) Drinkware Family, including the 30 oz. tumbler and its MagSlider(TM) Lid, is completely dishwasher-safe. While the magnetic slider adds a layer of protection, please remember this lid design is not leakproof and will not prevent spills. Get the best 30 oz insulated tumbler today!