Do both the original and the Go have the same "bottom" side that sits on a cup, i.e. can they accommodate the same cup "top opening" diameters? Or is the Go smaller and only able to use the provided cup? Or does the original have a broader range of cup sizes that can be used with it? – From Amy S.

The original AeroPress and the Go have the same cylinder and cap diameter but the flange that supports the AeroPress on your cup is smaller on the Go. The Go can sit on a cup with a maximum inside diameter of about 3.25” whereas the original AeroPress can sit on a cup with a maximum inside diameter up to about 3.75”.