Model of rubber transition between 2 features

Hi,

Not sure if the Surfacing area is the proper place for this question, or perhaps the plastics area, or some other area? - if not, then let me know & I can move it to the proper place. 

Anyway, I am modeling a button which is offset from the main feature.  The transition between the button & the main feature is rubber, such that when the user depresses the button, the rubber allows it to move. 

You can see from the pics I posted, 1 is an actual photograph of what I'm trying to emulate in modeling (it's actually a "Wet-Nap" box), the 2nd pic shows the approach I started taking in modelng it, as I used 2 concentric & offset slots (1 for the hole, the other for the button protrusion).  And the 3rd pic is a screenshot of how I modeled it using to concentric & offset slots.  I also created an arc sketch on a place through the mid-point of these features, because I thought I could use that as some sort of "guide curve" for a revolved loft of some sort?  I'm not sure if would do this as a revolve, a loft, a sweep, some sort of "surfacing" commands (and which ones) - I don't know, that's why I'm here asking the question.

So, as I said, not if this is a surfacing question, or a plastics question, which is 1 of the reasons I'm not sure how to approach this. 

Thanks in advance,

Rob

SolidworksSurfacing