Often you can tell what a bottle was used for by its shape.
For example, soda water and beer have distinctive shapes that were rarely used for other products.
Machine made bottles generally have a distinct side mold seam visible on the body, shoulder, and all the way from the neck and may incorporate part of the lip.
Bottles in the period of 1890 to 1910 were made by a combination of techniques ranging from being blown in a mold by hand with the top hand-finished, to machine made bottles that had minor hand finishing of the top.
[Keep in mind that pontil scars are still found on modern-day artisan made or boutique glassware pieces.] Pontil marks may be open rings or solid disks.