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The Pirani Insulated Stackable Tumbler in The Deep (Navy) color is a remarkable product that Samantha put to the test in her video review. She was impressed by its ability to keep ice intact for over 12 hours, showcasing its exceptional insulation capabilities. The tumbler's dishwasher-safe feature and leak-proof lid make it convenient and hassle-free to use. Its skinny wall triple insulation ensures that your beverages stay at the desired temperature for longer periods. Samantha also mentioned that the tumbler is easily stackable, adding to its practicality. Overall, the Pirani Insulated Stackable Tumbler proves to be a reliable and efficient choice for those who value long-lasting insulation and durability in their drinkware.