I work in a restaurant and ever since COVID the health inspector has been SUPER cautious about our soda machine. We run a clean ship but it's always the first thing they look at, and they go over it with a fine tooth comb.
Pinching pennies tends to be a really bad way to improve profits, though. Especially if you're lowering customer satisfaction or attraction in the process.
Not that companies and managers won't still try doing just that.
McDonalds isn't really a fast food company. McDonalds makes most of it's money via real estate investment. The suckers who open franchise locations are the only ones who care about pinching pennies on food and drink.