To be fair, ethyl alcohol was (and is) one of the better preservatives for products intended for internal consumption or external use.
Each of the pictured bottles has a relatively short description and explanation including estimated dates or date ranges for that type bottle and links to other view pictures of the bottle.
The growing strength of the Temperance movement and rising anti-alcohol fervor during the late 19th and early 20th centuries led to the passage of ever increasing restrictions on the manufacture and sale of alcoholic beverages. The power of the Temperance movement culminated in the addition of the 18th Amendment to the Constitution on January 16th, 1919; the amendment written to take effect one year after ratification, i.e., January 17th, 1920.
The famous (or infamous depending on perspective) Anti-Saloon League was primary force doggedly pursing the move towards the banning of alcohol and one of the first the successful single-interest pressure groups in the U. National Prohibition, however, was already the law of the land through Congressional passage - over a presidential veto - of the National Prohibition Act (aka the Volstead Act) on October 28th, 1919 which took effect immediately, although existing stocks could be sold through the January 16th, 1920 date.
As with virtually all of the bottle type categories to follow, liquor bottle diversity is staggeringly complex in depth and variety.
The pictures on this page show just a small bit of this variety.