Cannabis review site 420 Pony announced this week the winner of their 2016 420 Product of the Year Award: the Wax Liquidizer. The Wax Liquidizer, if you don’t know, is a solution in a bottle that will, like it sounds, liquidize concentrates so that they can be used in a vape pen.

A neat trick, but we were curious, since we couldn’t find it listed anywhere on their website, just how this magical concoction works. You can find this nifty video on their site, which shows users the three step process to transform solid extracts to liquid hash oil:

It’s pretty simple: just combine one gram of concentrate with two milliliters of Wax Liquidizer, heat, and mix it up. So, the video shows you how Wax Liquidizer (and also makes preparing the solution look like a junky preparing their heroin fix), but it still doesn’t show why it works.

Though you won’t find the ingredients or science of the nifty product anywhere on their website, it’s not that big of a mystery. We emailed representatives of Wax Liquidizer and found that the compound is made from propylene glycol (PG) and its derivatives, PEG200 and PEG400. According to the company, all these ingredients are categorized “Generally Recognized as Safe” (GRAS) by the FDA and are “used in many food, medical and baby products.”

Propylene glycols are also pretty commonly used in liquid nicotine and liquid hash for vape pens, as well as in injectable and topical medications such as diazepam and lorazepam.

420 Pony says the award was given to Wax Liquidizer on account of its “Unique Concept to 420 Consumption,” “Healthy Alternative to Smoking Marijuana” and “Ability to Bring Two Growing Industries Together” (cannabis and vapes).

The product comes in six flavors: Banana OG, Grape Ape, Strawberry Cough, Original, Ice Hit and Pineapple Express. One of the 420 Pony testers responsible for awarding Wax Liquidizer said they loved the product because it, “makes Vaping Shatter a part of my daily routine…. So easy and So tasty!”