Hashish, a marijuana product that’s gotten people stoned for centuries, has spawned a new generation of cannabis concentrates that are in such high demand they’re poised to become the most popular way for Americans to consume legal pot.

Dried marijuana flower buds account for the majority of sales in states where pot is legal, but concentrates are gaining ground fast, largely because of new vaping products, according to a report published Tuesday by industry consultants Arcview Market Research and BDS Analytics.