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The perfect travel mug has nearly 4,000 5-star reviews — with good reason

For years, I searched for the perfect to-go coffee mug.

They all ended up gathering dust in the back of my kitchen cabinet—some leaked, others were difficult to clean, and many were just too ginormous to be practical.

Until I stumbled upon the Hydro Flask.

If there is a perfect travel coffee cup out there, this is it. Let me count the reasons:

Hydro Flask
The Hydro Flask travel mug comes in three sizes: 12, 16 or 20 ounce.

1. It comes in three sizes, including a compact 12-ounce. Often, I drink my first cup of coffee at home, and then want just another cup or two to take on the road—without having to lug some giant, oversized mug for a small portion. The Hydro Flask comes in a 12-ounce size, which is perfect for typical mornings—and it easily fits in cupholders. But if you do like to take more coffee with you, it also comes in 16- and 20-ounce sizes.

You can open the flip-top lid one-handed, with the flick of a thumb.

2. The flip-top lid doesn't dribble all over you. It seems like a no-brainer that a travel mug should be easy to drink from, but many aren't: Some are screw-tops (dangerous while driving, and just plain inefficient), and others are just not well-designed, and liquids somehow end up dribbling all over you. Hydro Flask's flip-top lid can be opened one-handed, with the flick of a thumb, and the opening sits down low enough under the lip to keep coffee from ruining your outfit before 9 a.m.

Tracy Saelinger
We shook the Hydro Flask travel mug while it was upside down, tossed it carelessly into a bag, knocked it over, and it never leaked (with the flip-top lid closed, of course).

3. It doesn't leak. Period. You can turn this thing upside down, toss it in your bag, knock it over in your car, and as long as the flip-top lid is shut, it will not leak.

4. It stays warm. In our tests, the mug lost about 10 degrees of heat every hour, so a 170˚ cup was down to 110˚ by six hours, which is how long the company says it keeps liquids hot until. (It credits the "double-wall vacuum insulation technology.") The flask will also keep beverages cold up to 24 hours.

Tracy Saelinger
With only two parts, the cup is easy to clean (by hand--vacuum-seal insulated mugs should never go in the dishwasher).

5. It's pretty easy to clean. Like any mug with a vacuum seal, this one can't go in the dishwasher, which can ruin the seal. But it's still pretty easy to clean by hand, as it doesn't have a million parts: just the mug and lid, plus a gasket in the lid that stays in place and miraculously doesn't get gross. It's best to soak both the lid and mug in hot, soapy water, though the cap is technically top-rack dishwasher safe.

6. It comes in a bunch of colors. Aside from classics, like black, white, stainless and graphite, the flask also comes in cheerful colors like kiwi green and mango orange.

Hydro Flask Double-Wall Insulated Mug with Flip-Top Lid, $22 to $28, Amazon

Hydro Flask

I recently went to order another one — for a houseguest who raved about the mug — and was not surprised to see I wasn't alone: The Hydro Flask is closing in on nearly 4,000 five-star reviews on Amazon. Lots of other people, I noticed, buy the largest size for water, as it doesn't sweat and leave rings—and some users even noted that their ice cubes were still intact at the end of the work day.

The truth, though, is in the excessive use of caps and exclamation points ("Best Drink Bottle EVER!!!" or "Life changing!" or "I LOVE THIS THING"), and general outpouring of emotion. One user even likens it to something "forged in the heart of a dying star, like Thor's hammer" — wow, and I thought I liked the thing.

If you're looking to take advantage of Black Friday flash deals, Thermos mugs are 35% off on Amazon today, November 21st, only!