I've have uploaded a 'thicker' walled version of this bottle and will try ordering it again.
While the current 3D model is good to print on a basic 3D printer, I guess it wasn't quite right for Shapeways.
Once I've received a successful print from them, I'll update the design files in the original reward and do a post announcing it.
This may occur a few times as I order each bottle in turn. When I can afford it, or when someone tells me a print failed.
Sorry for the inconvenience.