Cannabis beverages could soon become a lot more mainstream, at least in Canada, where the products are now legal. As of Oct. 17, edible and ingestible cannabis products are legal -- in some retail shops, they hit store shelves by December. Big beverage companies like Constellation Brands and Molson Coors have gotten involved in producing cannabis-infused beverages, with the former teaming up with Canopy Growth while HEXO has a joint venture with the Canadian arm of the latter.