Loading

MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

Download Now

Report as inappropriate

You just need the diameter of the bottle and divide it by the diameter of the tower. This leads to the scalefactor. At best I think is, measuring the bottle filled, but not under pressure and substract twice the material thickness of the bottle, after you cut it open.
I don't have any bottles on hand, and I'm not sure if we have any standard available, looks like every bottle is different. Finding a straight one is the first goal, then measure it. You can use a measuring tape to get the circumference and divide this by pi to get the diameter.