The 10 Best Vacuum Flasks

Vacuum flasks have come a long way since the thick plastic mugs of your childhood. Easy-to-clean materials and impenetrable insulation are now standard features of the best vacuum flasks. But, despite all of the cool new features out there, not all vacuum flasks are created equal.

When you're looking for your ideal vacuum flask, you need to consider which features you need the most. If you usually carry cold drinks, look for a double-walled bottle. The extra insulation keeps the bottle from sweating, so you won't end up getting drips of water all over the place.

If you use a travel mug mostly for coffee, a tight seal is your best bet. Vacuum seals prevent the lid from popping open and spilling hot coffee everywhere, and they also trap the heat inside the bottle — so your coffee will stay hot for hours. You can even carry some homemade soup that'll stay warm till lunchtime.

If you like to have different drinks in your travel mug every day, that's fine, too! Most of these vacuum flasks can deal with hot or cold. The insulated walls leave them cool to the touch, so you'd hardly know if you were carrying around ice cold water or boiling hot tea.

These vacuum flasks make daily hydration hydration (and caffeination) a million times easier — and many of them are BPA-free and dishwasher safe.

1A Stainless Steel Thermos Designed For Cupholders

Amazon

Thermos Stainless King Travel 16 Oz Tumbler, $20, Amazon

Carry coffee in your car with no worries about spills with this BPA-free 16-ounce thermos. The stainless steel cup has a vacuum seal to keep drinks warm, while the cup itself tapers to fit perfectly into any cupholder — and it can even be cleaned in the dishwasher. One reviewer exclaims: "Best travel mug I've used," and "It keeps coffee hot for hours, is easy to operate one-handed, and the tapering base means it fits in the tiny cupholders in my tiny car."

2A Travel Mug With Over 13,000 Glowing Reviews

Amazon

Contigo AUTOSEAL West Loop Stainless Steel Travel Mug, $15, Amazon

With over 13,000 positive reviews on Amazon, this 16-ounce travel mug is a huge hit. The autoseal lid gives you a vacuum tight seal that can't be accidentally opened. Even between sips, the lid prevents any spills. The mug is also dishwasher safe and BPA-free. One enthusiastic reviewer wrote: "This is the best coffee mug I have ever owned. bottom line: lives up to its promise. I actually forgot this mug in my office before a meeting and when I came back for it six hours later the coffee was still STEAMING."

3A Thermos That's Super Slim But Still Hold 32 Ounces Of Liquid

Amazon

Thermos Vacuum Insulated 32 Oz Beverage Bottle, $29, Amazon

You'd never guess this bottle holds 32 ounces from it's slim, compact design, but it does! The stainless steel exterior makes the thermos practically indestructible while the vacuum insulation keeps your beverages hot or cold for up to 24 hours. Plus, the lid twists off and you can use it as a cup.

4A Travel Cup That Turns Hot Coffee Into Iced Coffee In Five Minutes

Amazon

Zoku Grey Iced Coffee Maker, $31, Amazon

Make iced coffee on your way to work with this 10-ounce BPA-free travel mug. Just put the mug in the freezer, pour in any hot beverage, and it becomes icy cool in under five minutes. The built-in straw is leak resistant, so you can enjoy your instant iced drink anywhere.

5A Thermos With A Hook For Your Tea Bag Or Diffuser

Amazon

Thermos Vacuum Insulated 16 Oz Travel Tumbler, $24, Amazon

If you're a tea fanatic, this 16-ounce travel mug is for you. The vacuum insulation keeps drinks hot for five hours, it's BPA-free (despite having a plastic lid, and can be easily cleaned in the dishwasher. It has a special hook to hang your tea bag or diffuser, so you'll always have a perfect cup of tea at the ready.

6A Vacuum Flasks That Keeps Drinks Cold For Two Days

Amazon

CamelBack Chute Stainless Steel Water Bottle, $28, Amazon

Nothing keeps drinks cold like this 20-ounce bottle. Though most vacuum flasks offer insulation to keep drinks hot or cold, this is the only bottle that'll keep your beverage cold for a full 48 hours! The cap is made from BPA-free plastic, and the entire thing can be put in the dishwasher. This is the perfect bottle for camping.

7A Thermos That Lets You Measure How Much You Drink

Amazon

Thermos Intak 24 Oz Hydration Bottle with Meter, $10, Amazon

Find out how much water you're really drinking with this 24-ounce bottle. The BPA-free bottle includes a meter that lets you document how much H2O you've taken in over the course of the day. Plus, the simple push button lid gives you easy access, then closes for a tight, hygienic seal.

8A Huge Vacuum Flask That Holds 64 Ounces

Amazon

Simple Modern Summit Water Bottle, $29, Amazon

Whether you need a ton of coffee or want to make sure you're hydrated, this mug will do the trick. It holds 64 ounces giving you your daily recommendation of water in one bottle. Plus, it'll keep cold drinks cold for 24 hours or keep your coffee steaming for eight. This flask is BPA-free, but it does need to be washed in the sink.

9An Insulated Mug With A Built-In Coaster

Amazon

Ello Cole Vacuum-Insulated Travel Mug, $16, Amazon

Keep your furniture safe with this 16-ounce stainless steel mug. The cork-composite bottom acts like a coaster, so it won't leave rings on any table. The entire thing is dishwasher safe, and the BPA-free plastic lid slides open for leak-free sipping. "Love this. It keeps my coffee hot for hours," says one reviewer.

10A 30-Ounce Travel Mug With A Clear Lid & A Stainless Steel Straw

Amazon

Atlin Tumbler with Clear Lid, $13, Amazon

Your cup will never be empty with this BPA-free 30-ounce travel mug. The clear lid lets you see exactly how much of your beverage is left over, so you won't be caught off guard without coffee. Plus, it comes with a stainless steel straw and special cleaning brush to make drinking even easier. And, when you're not camping, it can be washed in the dishwasher.

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