Bundle is a relatively new website and tool for understanding household spending habits.  It is a great way to compare what families in different cities are paying, on average, for food, shopping, and health care costs.  It does not include mortgage and rent.  For example, take a look at spending in Austin, TX, where people spend more on average than any other American city:

The other end of the list is Detroit.  Take a look:

The data is a few months behind at the moment--it runs through December of last year--but still provides some interesting comparisons.  Most people probably understand that spending varies based on geography--but just how widely that spending varies might surprise some.  

Check out the list of the top 25 spending cities here.  (Hat tip: Kit Tisdale)