Skip the Stanley Cup because this Zojirushi thermos is about to change your life. When I say I’ve found the best thermos on the market, I say it with conviction. It has been my sole choice for the past five years because, compared to competitors, this one is easy to clean and doesn’t rust, leak, or get cold after just a few hours. 

This vacuum-sealed, easy-to-clean, nonstick, coated interior container guarantees your daily dose of caffeine stays piping hot or frigid cold for up to six hours, but I’d argue it lasts much longer. In my experience, it’s still warm when I arrive home late into the night after preparing it that morning on the days I didn’t manage to drink it all. Plus, it comes with a 5-year warranty for heat retention.

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Featuring a two-step lid release mechanism, this thermos guarantees that any condensation buildup won’t unexpectedly douse you upon opening. Its secure lock ensures a leak-proof seal, making it an ideal travel mug. I throw it in my purse and have had zero spills or accidents over the five years I’ve used it daily.

Pouring your beverage is effortless through its 1.5-inch opening, complete with a special air vent to prevent spills or gushes. Catering to cleanliness enthusiasts like myself, its rubberized stopper pops off seamlessly for easy cleaning, ensuring my well-loved mug remains spotless. It’s made of BPA-free plastic and stainless steel, so you can rest assured you’re drinking from non-toxic materials.

It’s ultralight and compact with a sleek design, available in over 24 colors and three different sizes: 12 oz., 16 oz., or 20 oz. I opted for the 12 oz. size because it is useful when traveling between destinations, but I’m contemplating purchasing a larger size for the office (because caffeine is magic) and it would be great for long road trips, too.

Over five years ago, I purchased my Zojirushi stainless steel mug after a strong recommendation from my partner. Being the self-proclaimed nerd that I am, I meticulously compiled a list of my favorite characteristics over the years.