As more and more leading brands like Coca Cola, Molson Coors and Constellation Brands prepare to get in the cannabis game, marketing for this product is ready to break out of its niche and become mainstream. There’s a reason spirit makers are leading the way, with a reported decline of nearly 14 percent in beer sales since the legalization of marijuana in states like Colorado, California and Washington. That’s why all packagers should know what is governing this industry, because they soon may be a part of it themselves.