Most of the modeling is done, but this mug is not quite ready to print. The body and handle are still two separate pieces and the bottom of the body, while flatter, isn't quite flat enough to trust to printing. We will be making some changes that will make further editing difficult so first we will make a duplicate of the mug's body easily modifiable objects.
Even though it's only been a while set another save point (Press F2, then Numpad +, and click on Save As Blender File) now.
Carry out the following steps to make a duplicate of the mug: