"Epsteam glass bottles"!" she said.
"Oops! Or: There Goes Another Etsy Sale" (yes, it's about what you think it is) and the other is "When Selling on Etsy Lifts My Spirits," the story of a man who bought that first red bottle above, the swirly one with the yellow felt craspedia flowers, and why he bought it
Numerous articles on collecting antique or vintage bottles can be found on the internet, as well as a variety of books on Amazon, if you'd like to familiarize yourself with what to look for.
Or, if you're like me, you can simply collect ones that you like!