In the world of professional spirits reviews, “smooth” is something of a dirty word. Consumers, on the other hand, absolutely love to use it.

The implication of “smooth” is simple; it suggests a product doesn’t hurt when you drink it. It’s such a sought-after quality that the distilling industry will do just about anything to achieve it. Some methods are respectable, like aging a whiskey for 15 years to file down its rough edges. Some are less so, like dumping in loads of chemical additives. Some are more successful than others, but none can completely eliminate that burning sensation in your mouth.

But it wasn’t until Joana Montenegro and Martin Enriquez, the spousal founders of Voodoo Scientific, that anyone really asked: Why does alcohol burn, anyway? And, most importantly, is there a way to get rid of that gasp-inducing burn altogether?

Conventional wisdom and common sense would suggest that ethanol is what makes that ill-advised shot of firewater sear your mouth and throat so badly, but it turns out that’s not the case. During the months of Covid-19 lockdown, Enriquez, a former telecom executive, says he and Montenegro, essentially on a lark, had the idea to dig deep into this question. They started by scouring the scientific journals to see if anyone had pinpointed the reason why whiskey and its ilk can cause an unpleasant burn. No one had. “Nobody could describe the compounds that make that harsh, painful bite,” he says. “No one could really identify what it is that attacks you and creates pain.”

Montenegro, a veteran food scientist from General Mills and Land O’Lakes, said they decided to go deeper. “We said, ‘Let’s go back and find the specific receptor in the mouth that’s being triggered by the spirit,’” she says.

To do that, the duo started by contacting David Julius, the head of physiology at UCSF, to discuss the line of inquiry. Masked and 6 feet apart in a Starbucks, Montenegro says, Julius didn’t comprehend why someone who was part of the team that patented Go-Gurt had an interest in pain receptors. Nevertheless, the duo persisted, and Julius eventually guided them on how to research the concept and determine which receptor was being activated to cause a pain response. Eventually Montenegro and Enriquez found it, a receptor called TRPA1.

Once a negative receptor like this is identified, traditional food science has a solution for dealing with it: You block the receptor with a chemical. It’s the typical way that sweetness and bitterness can be masked in foodstuffs, by just covering it up with something stronger. Alas, that didn’t work for hiding the burn of alcohol. “This receptor has a very unique property called reversible bonding,” says Montenegro. “It’ll bond to a thing, it’ll give you a jolt, and it’ll let it go—and then it’ll bond to another one.” This is why alcohol continues to burn sip after sip.

“In other words, you can’t block it,” she says. “It’s designed to continuously alert you that you’re consuming something that is an irritant.”

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I’ve been hooked on smoothies in an almost superstitious way ever since college: A fruit smoothie is like a good luck charm, promising the health you feel you deserve despite all your other bad decisions. But in my more recent adult life, a good blender is the passport to taqueria salsas, Oaxacan-style mole, and all the delicate emulsions I once had to buy at restaurants and in jars.

Well, Vitamix crushes the blender game, but usually comes with a price tag to match. Luckily Vitamix promo codes crop up at various points during the year, and we’re here to help you stay up to date on those discounts.

Vitamix New Ascent X5 With Stainless Steel Container

Vitmix’s top-of-the-line blender model, Ascent X5, is now constructed with a stainless steel container. The 48-ounce stainless steel container is not only huge and hygienic, the machine itself combines an intuitive touch interface with a refined, timeless design. The non-reactive stainless steel material resists stains, odors, and corrosion, and expertly handles hot, cold, and acidic ingredients. This futuristic gadget also has an automatic self-cleaning program and ten blending programs for popular items like smoothies, soups, frozen cocktails and more for a precise blend, every time.

Get a $25 Vitamix Promo Code Plus Free Shipping

Vitamix has tons of ways to save on these handy kitchen gear items, including $25 off when you register your email. All you have to do is input your email on Vitamix’s website, and you’ll get a discount of up to $25 sent straight to your inbox. Plus, you’ll get free shipping on orders of $100 or more.

Does Vitamix Offer Free Shipping?

Glad you asked. Vitamix is offering free standard shipping for orders above $99. This pretty much means that ground shipping is free for blenders at the current discounts. Priority shipping is not free, however.

The WIRED Gear Team’s Favorite Vitamix Blenders

WIRED has long been singing the praises of the classic Vitamix 5200. The model made a blender convert out of contributing reviewer Joe Ray after he realized that the “model of preference for blender aficionados around the world” was also his key to home mole and Oaxacan-style cookery.

A similar road-to-Damascus moment beset WIRED contributing reviewer Heather Arndt Anderson when she tested the Vitamix Ascent X2, also currently on a $50 promo discount. “The more I thought about it,” she wrote, “the more I realized that maybe I’ve never been a blender person because I never had a good blender.” Anderson also made a big batch of mole and avoided passing out from chile fumes, then moved on to homemade masa and a Georgian walnut spread. She regretted only that the blender wasn’t easier to clean.

After testing through a number of brands’ blenders, WIRED contributing reviewer Emily Peck marveled that even the basic Vitamix Explorian E310 churned almonds frictionlessly into butter without even need of a presoak.

Additional Vitamix Deals and Sales in 2025

Vitamix tends to offer a number of other deals and sales throughout the year, like Presidents Day, but the next one won’t crop up till Mother’s Day. Other deals to expect crop up during the summer, alongside the eternal Black Friday and Cyber Monday Deals.