flying off the shelves, diapers, detergent, coffee pods, ice cream, and carbonated drinks but online delivery may mean bad news for big grocery chains. what does this mean for your traditional grocery store that's just a grocery store >> if there is a very specific brand you want, amazon can get it for you, and you aren't going to be able to get that at your average local grocery chain. >> reporter: online ordering with in-store or curbside pickup is also surging in popularity, as companies try to bring down the cost of convenience. jo ling kent, nbc news, new york and we've got more on our top story, right after this.