Update March 25: Due to overwhelming demand and global packaging shortages, Grateful Dane is no longer selling its hand sanitizer to the public at this moment. The team has pivoted to supplying hand sanitizer in bulk to first responders in Houston.

Even before the Great Toilet Paper Shortage of 2020, hand sanitizer was one of the first items to fly off the shelves during the spread of the novel coronavirus, and is still nowhere to be seen at local stores. Luckily, the Alcohol Tax and Trade Bureau (TTB) just relaxed its rules to make it easier — and faster — for distilleries to produce their own hand sanitizer products.

On Chron.com: Houston’s Gulf Coast Distillers manufacturing hand sanitizer amid COVID-19 threat

The latest distillery entering the field is Grateful Dane Distilling, which makes rum in Houston. On March 21, from 1 to 5 p.m., owner Ian Mook will be giving away two bottles of hand sanitizer for every bottle of rum purchased, as well as selling the hand sanitizer separately, at cost.

"I knew there was a shortage and I knew I had the ability to manufacture this," says Mook. He added, once the regulations were lifted, “it only made sense for me to start making this."

Making hand sanitizer is a pretty seamless process for a distiller. Alcohol is composed of a bunch of different chemicals; when crafting spirits, most boil off the still to make a food-grade product, leaving just ethanol—that's what we drink. But the other chemicals, such as acetone and methanol, are the very elements needed for hand sanitizer.

On HoustonChronicle.com: When life hands you quarantine, make a quarantini

"It's normally a byproduct that most distilleries just throw out," says Mook. "It's not worth the time or effort to even manufacture something like that, but we live in strange times."

Just add glycerol, hydrogen peroxide and distilled water, and voilà. It doesn’t affect the rum production at all.

His main issue is actually packaging. Right now, he's using the 500 1-ounce bottles he already had on hand for rum samples, but is trying to acquire bigger bottles. He'll have enough made for 375 bottles this week. When he’s used up that supply he plans to move onto 2- or 4-ounce bottles when he can get them.

On Saturday, the hand sanitizer will be available for curbside pick-up, for $2 while supplies last. There will be a limit of five bottles per household.

"We're not trying to make a profit on it, we're just trying to help out," he says, adding that he will continue production as long as there's demand.