Subject: Are there specific reasons why fast food restaurants use different straws?

I google'd "carbonation levels" and a post from here was the first result 
which basically led me here. The question was "are there different carbonation 
levels in sodas". I knew the answer the yes, but what I really wanted to know 
was is there a reason why fast food places use different sized straws because 
of their carbonation levels? You can go to Wendy's and get a Dr Pepper, and 
you can go to McDonalds and get a Dr Pepper. These two Dr Peppers still taste 
like Dr Pepper, but there's a slight difference. What I'm wondering is, does 
the difference have to do with the size of the straw in relation with the 
amount of carbonation they put in it and how it tastes. Say Place A uses a 
small straw, and uses less carbonation than Place B which uses a bigger straw 
and more carbonation. Something to that nature.

Re: Are there specific reasons why fast food restaurants use different straws?