Well, here are the maps in all their splendour. I should mention that I actually looked for 'pop can', 'soda can' and 'coke can', mainly to try to get references to pop music weeded out.
This one is a bit confusing. Theoretically, 'soda' (seemingly by far the most popular) is bicoastal: you should see usage in the Northeast and in the entire West. While that is to an extent true, a few anomalies show up here: first, California ranks low. Second, Wisconsin (Midwest as they get) ranks high. Third, so does Florida, which is confusing in consideration of the third one:
Here's 'coke', a Southern map if there ever was one (though it spikes all the way up to Lake Michigan). I had figured this map would be less defined, since the flagship brand of the Coca-Cola Corporation is rather popular nationwide, but this map does exactly what it promises. Interesting to go back to my earlier entry on religions and compare 'coke' to 'Baptist', 'pop' to 'Lutheran'.
And I dare anyone to find meaning in that...