Dating website cork
(The two products were from separate companies which were cross-town [Sacramento, CA.] rivals during the late 19th to early 20th century.The author has also seen Star Bitters labels on Wait's bottles as well as both labels on the immensely period popular Hostetter's Stomach Bitters bottles!Other diagnostic tools must be used to date these items.Shape is more indicative of function - i.e., what the bottle was used for or contained - but even that has a myriad of exceptions.Of course, soda & beer were reused up until quite recently.The bottle pictured to the right has a Wait's Liver and Kidney Bitters label pasted over the embossing of a Star Kidney and Liver Bitters bottle!See the Bottle Typing/Diagnostic Shapes page for more information on the subject..And last, but definitely not least, is the fact that the art and science of glassmaking had a lot of glassmaker/glassblower induced uniqueness in the form of variations, errors, experimentations, and retrogressions.
Some technological changes were expensive and not adopted by glass makers until it became an "adapt or perish" issue and many glass factories just perished.
An example of this is the finding of a few pontil scarred utilitarian bottles among otherwise late 19th or early 20th century refuse.
It is unlikely that this bottle was made during the same era, but instead was reused for a lengthy period or otherwise retained until broken or discarded.
Acceptance often occurred over a period of many years or decades in some cases.
This technology lag makes some diagnostic characteristics better than others for dating. As a corollary to #1, consider the following quote: "Treat terminal dates with care.