The biggest hurdle for taking draft beer on the go is keeping it cold and carbonated once you leave the brewery. And while insulated travel growlers help keep drinks fresh for longer, traditional glass growlers start losing carbonation once they're opened.

Portland-based GrowlerWerks combats the scourge of flat ales with a line of growler kegs featuring built-in tap handles that mimic a brewery-fresh pour. And with the company's lightweight and affordable uKeg Go ($99) model, GrowlerWerks is making sure your sudsy drink of choice can survive all-day cookouts, lazy nights on the patio, or a week in the fridge.

How is the uKeg Go different from a growler?

The main selling point of the 64-ounce uKeg Go is its tap, which dispenses beer just like you'd be served at a brewery. But it’s not as simple as just filling it up and playing bartender—you’ll first need to install an 8g CO2 cartridge before you even pour your first pint. Much like an actual keg, the CO2 is what’ll actually keep your drink nice and foamy after you've filled the growler. (GrowlerWerks sells its own CO2 charges separately at $12 for a pack of 10. Each cartridge should last for the entire 64 ounces.)

The cartridge itself pops right into a sleeve, which you then screw into the bottom of the cap. Once you've tightly secured the cap onto the growler, you can choose your carbonation setting—first position for beer and cider and the second position for soda and cocktails—and start pouring.

Though the system isn’t complex, you’ll definitely want to give the instructions a once-over before you first use it—I wound up wasting my first CO2 cartridge because I didn’t have the cap in the “off” position when I first installed it, resulting in it emptying out before I could even screw it on.

So, does it work?

My first drink—Coke, because my local breweries still aren’t allowing private growler fills due to COVID-19—came out perfectly chilled and fizzy, as if it had just been poured from a fountain. But time is the enemy of all carbonated beverages, so over the next eight hours I poured a few more glasses to see how both the CO2 and the temperature held up.

I found that there was very little difference between that first cold glass at 8:00 a.m. and that final one at 5:00 p.m. The drink suffered virtually no temperature change, thanks to the uKeg Go’s double-wall vacuum insulation, and never lost any of that bubbly character. Even when the keg was left out in the sun from noon to 5:00 p.m., the soda remained unaffected.

GrowlerWerks

Because we're talking about a keg here, I knew I had to test out beer as best I could, so I transferred a few cans to the uKeg, and the result was pretty much the same—the growler maintained the beer’s temperature and carbonation level all day long, resulting in a consistent pour that never lost flavor or crispness. It’s basically indistinguishable from having beer straight from a brewery tap, and it'll probably be my go-to travel vessel anytime I bring local beer on the go.

While these tests simulated bringing the uKeg to an all-day event, the company claims the growler would be able to maintain the carbonation for up to two weeks.

How's the build?

The whole idea behind the uKeg Go is portability—it's meant to travel with you wherever you go, from a backyard barbecue to a weekend excursion out into the woods. And it sports a stainless-steel body that should be up for the challenge. It's lightweight, but the build is sturdy enough that you shouldn't fret that you've got fragile cargo with you (just be aware that there is a tap faucet to think about, so you might not want to jostle it around too much). There's also a convenient handle secured onto the top, making it easy to carry around with a finger or two while also traveling with beach bags and other outdoor necessities.

In terms of appearance, the uKeg Go is sportier and sleeker than the company's traditional uKeg model, looking more like an insulated bottle from HydroFlask or Stanley than a piece of brewery equipment. And there are two colors to choose from: a uniform tungsten gray model and a slightly bolder chili red, which is what I went with.

You can pick up a uKeg Go for $99 on both the GrowlerWerks website or Amazon. There’s also the company’s standard uKeg growler that ranges from 64 to 128 ounces and features a much more nuanced CO2 system. That'll run you $159–$209, depending on the exact model you get. And if coffee is more your speed, the company recently released the uKeg Nitro ($199) model that dispenses creamy, nitro-infused cold brew with the pull of a lever.