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We have tried to define the distinction between these two classes of bottles from the perspective of the intent of and information found on this website.: This website was prepared based primarily on information about bottle manufacturing technologies, processes, and styles specific to the United States. Viewers are encouraged, for personal or classroom use, to download limited copies of posted material. Author reserves the right to update this information as appropriate.

Empirical observations indicate that Canadian-made bottles very often followed similar glassmaking technique and process chronologies making much of the information applicable to Canadian made bottles. If using this site for the dating or typing of a known or likely Canadian-made bottle, keep this in mind as the reliability of the information may be reduced.

It also includes "Bottle Dating Worksheets" (pages 51 to 55) by Rebecca Allen and this author to assist in the systematic dating of an historic bottle based on the information in that dating key as well as other information on the website.

In part, this book fulfills this authors long time desire to have a hard copy "field guide" version of this website for use by archaeologists (and others) by having at least the dating portions available in printed form to take to the field.

If you are interested in identifying what a bottle was likely used for - i.e., what "type" of bottle it is (aka "typology") - the Bottle Typing/Diagnostic Shapes page and the extensive array of related sub-pages should be visited.

Click on to view the portion of the Glossary Page that covers these subjects.This huge (555 pages), recently released work is one of the best "bottle books" there is for helping with the complicated subject of bottle identification.This book includes - for the first time in print - a summary of this websites () bottle dating key as a chapter entitled "Summary Guide to Dating Bottles" by this author (pages 33 to 49).When possible, the information on this website is given general reliability rating estimates (e.g., high, moderate, low or "usually", "occasionally", "almost always", "almost never") to allow a user some "feel" for the probable accuracy of their conclusion or determination.In addition, there are a hundreds of dating and/or typing determination examples scattered throughout virtually every site page to give the user a feel for the processes involved in dating and/or typing a bottle.

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