A medical marijuana dispensary in Maine offered do-gooders a chance to trade community service for free cannabis over the weekend—and it’s thinking about expanding the initiative statewide.

Gardiner-based Summit Medical Marijuana on Saturday offered cannabis to volunteers who cleaned up the community. Pick up a bagful of trash, the offer went, and trade it for a free gram of flower.

“Bring us back the full trash bag, and we give them a gift of cannabis,” Owner Dennis Meehan told local news station WCSH-6, adding that he got the idea after hearing about a similar event in Colorado. “They had a great response to this, so I was hoping to do the same thing in Maine.”

According to the company’s Facebook page, the event was a success. On Saturday afternoon, the dispensary posted an update showing a dumpster full of trash bags. “Mainers rock!!! You’re all amazing people!!!” the post said. “Anyone want to help do this statewide in 1 month or so?”

Giving out free bud may not be best for the company’s bottom line,  but Meehan says his number one goal is to make a better Maine.

“Something that caregivers do all across Maine that very few people know about is that they make huge sacrifices every week to help others live a better quality of life,” he told WCSH.

Gifts of small amounts of cannabis between adults 21 and over are legal under state law.