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I have included the URL to a tool called "Ad Preview" by Google. It allows you to preview the SERP and put in these input parameters - Location, Language and Device. If you want to simulate different areas, you just put in a different location. Putting in the location "United States" should give you the most reliable data for your queries. You will be able to see the snack-pack in the SERP and it will be simulated for the location you gave. https://adwords.google.com/apt/anon/AdPreview