Whether your choice of drink is a single malt or a bit of hard lemonade or unpeated scotches for beginners, a good flask will make discreet drinking much more pleasant. And while you may think any old flask will get the job done, there are a few things to consider.
First off, know where your flask will be carried to—is it for warming sips on big adventures, or for sly drinking? Second, pick your material accordingly. If your flask is going to be slipped into a suit jacket, consider a sleek leather case. If it will be tossing and tumbling in a backpack or hiking bag, consider a flask with a durable exterior. Either way, you’ll want a flask that won’t leave a metallic taste in your mouth and has an opening wide enough to sip comfortably on the latest of popular whiskey recipes you've researched.
After considering factors like these, we've selected Stanley's Classic Flask as our top choice; it's everything you could need, with nothing you don't.
That said, see our picks below for the best flasks available that range in quality, character, and price.
Stanley Classic Flask
Stanley’s classic drinking flask is as quintessential a canteen as you can get. It hits the perfect sweet spot of affordable, thoughtfully constructed, and ultra-durable. The tote-anywhere flask has a sturdy, reliable body and holds a healthy 8 ounces of liquids.
Made of 18/8 rugged stainless steel, double-wall vacuum insulation keeps outside temperatures from affecting your flask. Opt for the retro, 70s-inspired Hammertone green color, or give your flask a more updated exterior with Polar white or matte black options. The never-lose cap is built into the design—no hunting for a dropped minuscule cap on the forest floor.
Hip flasks are usually designed to be petite (they traditionally fit in a pocket, after all) but the Stanley flask is available in 5- and 8-ounce options. Or, upgrade the flask to a set that includes four handy shot glasses.
Snow Peak Titanium Flask
Though Snow Peak’s Titanium Curved Flask is a splurge, its Grade A titanium construction reflects that—it will hold up for years to come. Each flask is made with care and finished by hand in Niigata, Japan, with methods that have been passed down for generations.
The titanium flask is a step above a stainless steel flask—the material is stronger than steel, and boasts highly inert properties that make the metal incredibly anticorrosive. Titanium also doesn’t hold the flavors of its contents, so notes of peaty scotch won’t linger far after you’ve sipped the last drop.
This curved flask holds just over six shots of liquid (6.4 ounces). Each flask holds six shots of liquor (or 5.8 ounces), though smaller 4.7-ounce versions are also available. All flasks come with a synthetic leather case, a custom gift box, and a replenishing funnel.
Good to Know:
If you tend to misplace things, keep an eye out for flasks with attached lids. Or, opt for a brand, like Snow Peak, that sells replacement lids.
Best for Outdoors
GSI Outdoors Boulder Flask
GSI Outdoor’s lightweight flask is prepared for all terrains: it’s wallet-friendly, super-tough, and carries a hefty 10 ounces of booze. The flask is made with durable, shatter-resistant resin, outfitted with a grippy silicone bumper—drop it, bump it, and the flask will prevail. (Though note that its construction makes it tough to slip in pockets.)
The boulder flask has the classic appeal of a glass flask but without the risks of breaking or shattering (and the cumbersome nature of glass flasks). The clear exterior means you can tell exactly how much booze is left. The exterior of the flask is marked with graduations for simple measuring, while the opening pours easily and is large enough to sip from comfortably.
Related: The Best Cheap Scotch
Rabbit Stainless Steel Drinking Flask
This sleek flask from Rabbit is one of the smoothest ways to store liquor on the go. A subtle cap hides the traditional flask shape, but pop off the cap and you’ll find a smart flask model. Each flask is designed by a team of wine and cocktail lovers out of Seattle—the designers combine form and function, classic shapes, and pure geometry. Case in point, this updated hip flask is perfect for the modern drinker. A suave, matte black silicone exterior with classic gold accents gives a subtle art deco appeal.
Design aside, the flask is made with high-quality stainless steel and features a leak-free lid that snaps open and closes with ease—no twisting required (in other words, you can open the flask with one hand). Each flask has a liquid capacity of 6.5 ounces.
Best for Sharing
High Camp Firelight 750 Flask
Well-suited for taking on a quick hike, camping trip, or to the park, this share-ready flask from High Camp comes equipped with everything you need to split a drink with friends. The flask comes with two, six-shooter tumblers that attach seamlessly to the body of the flask using a magnetic locking system—the world’s first magnetic flask built for the outdoors. Each cup attaches to the BPA- and phthalate-free stainless steel flask. The lid is equipped with a leak-proof stainless steel plug cap with a silicone seal.
This double-wall vacuum-insulated flask holds 750mL—enough to hold an entire bottle of wine, whiskey, or your spirit of choice. Its leak-proof design also means you can pack the flask anywhere without worrying about your hiking clothes smelling like rum.
Good to Know:
Be cautious of the flasks you purchase. Many are made in bulk, constructed with cheap metals. Paying a little extra can go a long way, and look for stainless steel: an inexpensive alloy that is corrosion-resistant and lightweight.
Best for Whiskey
BruMate Liquor Canteen
BruMate’s bold canteens come in a range of statement-making patterns, from shimmering rose gold to funky tie-dye to black and white marble. Though the patterns look contemporary, this design is modeled after war-time gasoline cans, giving it a distinctly retro aesthetic.
The flask features a drop-proof silicone cover and a lid secured via a bendable silicone attachment. Each flask stands 6 inches high and holds 8 ounces of liquor. The brand’s line of flasks (along with its other products) is made of BevGuard technology that moderates temperatures—making it perfect for toasty or frigid conditions. BevGuard also prevents the metallic aftertaste that's often found in stainless steel flasks, meaning the metal won’t leech or taint your drinks. If it does, send the flask back—the brand guarantees a lifetime warranty.
Related: The Best Bourbons Under $50
VSSL Wilderness Navigation Flask & Flashlight
Heading out into the great outdoors? This VSSL Wilderness Navigation Flask is equipped with everything you need for a good day of hiking, While it looks like a flashlight to the untrained eye, the lid unscrews to unveil a glass-lined flask (the glass lining won’t pick up unwanted odors). Also, hidden away in the flask? Two collapsible shot glasses, a bottle opener, plus outdoor essentials, like a working flashlight with a 4-mode LED light (including red and SOS) and a compass.
The flask holds 9 ounces of liquid and stands 9 inches tall. It is made from military-grade aluminum. Batteries are included.
Related: The Best Rums
Bormioli Rocco Pocket Flask With Hermetic Lid
If you’re shopping for flasks on a budget, Bormioli Rocco makes an excellent option. It’s budget-friendly and holds a generous 8.5 ounces of liquid.
This flask is also made with glass, which won’t take on the flavors of whatever is inside. Consider this flask a great option if you’re infusing spirits, or, use it for olive oils or other liquids in the kitchen. The swing bottle stopper provides a strong, leak-proof seal.
Expect durable quality—the brand is known for making reliable glassware for bars. Of note, since this flask is glass it will make it prone to breakage if you’re tossing it in a hiking pack or picnic basket. Another downside is it is quite heavy, so it will be hefty to carry around.
Viski Summit Flask with Screw Top
Viski’s flask leans heavily on design, with a smooth copper finish and high-end look. It’s on the smaller side, able to hold just six ounces of liquid, but that said, at five inches tall it’s small enough to slip into a coat breast pocket or denim pocket.
This flask is plated in polished copper-plated stainless steel on the outside, with an finish that protects your drink from taking on any metallic flavors. Viski specializes in professional-quality barware, so trust this flask will hold up over time. This flask requires hand washing and to keep it lustrous, a good polish every 6 months. The cap screws on and is not attached.
Related: The Best Canadian Whiskies
If you’re looking for a tote-everywhere flask, Stanley’s Classic Flask (view at Amazon) can’t be beat, hitting the perfect sweet spot of affordable, thoughtfully constructed, and durable. If you’re working with a larger budget, Snow Peak’s Titanium Curve Flask (view at Amazon) has built up a loyal fan base for a reason.
How do you clean a flask?
The easy answer is soap and water. But if your flask has started to take on a smell, a bottle brush will help get into the corners for a deeper clean. Boiling water will help break down lingering scents, or if you’re looking for something more heavy-duty, add white vinegar or lemon juice and water to the flask, close it up, and give it a good shake.
How many ounces/liquid does a flask hold?
Flasks are available in a range of sizes, though the standard flask holds eight ounces. Larger flasks are available if you’re carrying drinks for two.
What alcohol is best for a flask?
The best thing to sip from a flask is hard liquor, be it scotch, rum, bourbon, brandy, or gin. Anything below 40% ABV—that means beer, wine, and cocktails—will not keep well in a flask.
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Kate Dingwall is an experienced spirits writer and glassware collector. She has been writing about the bar and spirits world for five years, from the best glassware to the most spirited tomes.
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National Institute of Environmental Health Sciences. Bisphenol A (BPA).
Food and Drug Administration. Phthalates.