TV is funny because it's creating little realities that many times seem to exist in a parallel universe, one that includes food and brands that don't exist in our world. Sure, we're used to really obvious and maybe less obvious product placement at this point, but it's more fun when things are made up, or in this case, a TV industry-wide inside joke. There have been a few different stories (and even a now-defunct blog) about the famous Let's potato chips that pervade TV—spanning networks, genres and decades, and it's fun to compare how the fictional brand is used in different  fictional worlds.