A Costco shopper professes his love for the store's beer in a viral commercial he filmed in his backyard

YouTube/Randy Colpek

Costco shopper Randy Colpek crashes through a wall of beer.

• A commercial created by an avid Costco beer drinker has gone viral.
• The video is a series of outtakes that show Randy Colpek breaking through a wall of Costco's Kirkland Light beer while shouting out a series of slogans. 
• Costco's Kirkland private-label brand makes up a quarter of its annual sales. 

This man loves Costco beer so much that he's made his own commercial of it. 

Randy Colpek - a carpenter from California, according to the Huffington Post - posted a video of himself breaking through a wall of Costco's Kirkland Signature Light beer, while shouting out a series of slogans such as: "Kirkland Light: it's got 30% less calories, so you can drink double the amount." 

The video was posted on YouTube a year ago but has since gone viral after he posted it to Reddit on Wednesday. 

Costco did not immediately respond to Business Insider's request for comment, but on Reddit, Colpek says that the retailer has expressed no interest in the ad. 

According to Esquire, a crate of 48 of these beers costs $22. 

Costco's low-cost private-label Kirkland brand has become a massive hit for the company since launching in 1995. These goods now make up about 20% of the products offered in the warehouse store. You can find Kirkland products in any category from groceries to household products and clothing. 

About a quarter of Costco's $118.7 billion in annual sales come from Kirkland products, and this number is growing, according to company executives who were cited by The Wall Street Journal.

The benefits of selling these private-label products are twofold: Costco is able to cut out the middleman, which eliminates any additional costs that would come from a supplier, and it has greater control over prices.

This means that private-label products can be sold for higher margins than national brands, as the initial costs are much lower.

You can watch Colpek's full commercial here: