What do the numbers on the bottom of old glass bottles mean?

The number (within a triangle with rounded corners) found on the bottom of plastic bottles is a code indicating the type of plastic the bottle is made from, and pertains to the subject of recycling) .

How do you date a 7 Up bottle?

7-Up and A&W brand cans are stamped (typically on the bottom of the can) with a manufacture date in MM DDD Y format. Shelf life is typically considered to be 9 months for regular sodas and 3 months for diet sodas.

How can you tell if glass is worth money?

Factors like age, item type, size, colors, and condition affect the value of carnival glass. Pieces dating before 1940 are more valuable, as are complete sets of items and larger objects. Colors like ice green (which is sold for over $16,000) and marigold are rarer and highly prized.

Why do old bottles have a round bottom?

The rounded bottom was to ensure that the bottle was left on its side so that the wired down cork would not dry out and shrink allowing the contents to loose carbonation and/or evaporate. Rounded base bottles were made of thick heavy glass and used for carbonated soda, mineral water, and in particular, ginger ale.

Do people buy old bottles?

People who collect bottles are often drawn to the hobby by the beauty of the bottles, the history behind them, and the fact that they are small and do not take up as much space as other collectibles might. Collectible bottles can be found at rummage sales, at flea markets, or even in the ground.

What do the numbers on the bottom of a Coke bottle mean?

If a bottle is from one of the first three time periods listed above (1938-1965) there will likely be a small embossed date code found on the waist left or right of a letter or symbol. For instance, the number “42” on a bottle marked either “87 L 42” or “42 L 87” would denote a bottle made in 1942 during WWII.

How do you date glass bottles?

A glass bottle’s embossing effects often help to provide positive proof of the bottle’s age. The embossing may be located on any part of the bottle. Multiple types of embossing effects may appear on a single bottle. You can often determine a bottle’s intended use by viewing its embossing effects.

Is there a dating page for Historic bottles?

Also linked to the Dating page is a sub-page called Examples of Dating Historic Bottleswhich tracks a few different bottles through a dating and general information quest to illustrate how the dating process and this website work.

What kind of information is in this bottle makers catalog?

This very large complex of pages includes bottle type specific sub-pages with extensive style based dating information, including complete scans of 5 different early 20th century (1906 to 1933) bottle makers catalogs spanning the mouth-blown to machine-made bottle manufacturing era!

What is BLM/Sha historic glass bottle identification&information website?

Welcome to theBLM/SHA Historic Glass Bottle Identification & Information Website! The Bureau of Land Management(BLM), an agency within the U.S. Department of the Interior, administers and manages over 248 million surface acres of America’s public lands, located primarily in 11 Western States and Alaska.