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This travel tumbler is insulated — so your hot or cold drinks will actually stay that way for hours! Promising review: "I bought the 12-ounce, and let me tell you! This is by far the best travel mug I’ve EVER bought. Super leakproof (and I shove it into my tote bag and duffel bag). Super durable. Great material, and the sip? Super smooth. No slurping because it allows air to flow out and in while drinking. Such a great mug. Worth every damn penny. Highly recommend. P.S. — hot stuff stays super hot for a long time." —Lindsay Panataleon Get it from Amazon for $24.99+ (available in three sizes, 10 colors, and with or without a handle).