I had previously made a slight bit of progress to form a purse. This was done by sewing the two pieces together along the bottom (inside out) and a zip along the top. In hindsight I would have chosen a different colour zip, but at that point I hadn't decided that it was going to be a watermelon!
3rd September 2013: Update - this post was featured here at Gingerly Made
3rd September 2013: Update - this post was featured here at JAQS Studio