This water bottle boot is meant to be printed in tpu plasic. You can scale the model up accordingly based on the size of your water bottle. The inside diameter of the current model is about 67.6mm wide, but I suggest adding an extra millameter or two because mine fits, but it is really tight. Other than that, the more infill you put, the sturdier the bottom will be, making it better for a really dented bottom, or just standing up in general.
The author hasn't provided the model origin yet.