I took a box( deep and large enough to put the bottle into it. ) I made gum paste and filled the box ,then i press the bottle into the box. I wait few time and i kept it out from the box . i let it dry enough time, you see when its dry , maybe three or more days ,depending the weather is. Gum paste must be firm sufficiently to let create the" body "of the bottle exactly like the original bottle while you press it into the box. I made a little wine bottle. goof luck!!!
thank you for sharing with us all. Do you have a picture of the small bottle that you made?