Positive features of glass bottle

The carbonated drink package requires a container that will hold pressure and not contribute off flavors. For many years virtually all carbonated soft drinks were packaged in glass bottles sealed with crown cork.

Glass, which is usually transparent, is an amorphous (non-crystalline) solid material which has a wide area of use for technological and decorative purposes. Glass bottles seem to be the safest option for food packaging and storage, since there is no possible transferal of contaminating chemicals.

Positive features of glass bottles for carbonated drinks:
*Reusable and recyclable. Glass recycling is also more environmentally friendly than plastic recycling, which can release toxic chemicals.

*Improved break resistance allows manufacturers to use thinner glass

*It has no permeability to gas, water vapor, odor and liquids.

*Maintenance of product freshness for a long period of time without impairing taste or flavor

*Useful for heat sterilization

*Rigid. It does not erode or degrade over time.

*Good insulation. Whether hot or cold, glass bottles hold liquids at a steady temperature more effectively than plastic. Glass can be used for liquids other than water without absorbing foreign flavors, odors, or colors.

*Production in numerous different shapes. They can be made in different forms, sizes and colors.

*Variations in glass color can protect light-sensitive contents.

*It is transparent, thus the product placed inside can be seen.

*Traditionally, beverages have been packaged in glass containers capped with a natural or plastic cork to limit oxygen intake and preserve the organoleptic quality of the beverage. Glass offers superior barrier performance to gases and vapors, high stability over time, transparency, and it can be easily recycled.

*Odorless and chemically inert. Glass packaging had the highest value in terms of preservation of the quality of food and was the only packaging material that could guarantee that there would be no toxic substance transfer from the package to the food.
Positive features of glass bottle

Crown cork: History and description

In the late 19th century, one problem was acute for the bottling industry. The bottle caps (“stoppers,” as they then were called) usually leaked or were not tight enough to hold the carbonation gas. Some stoppers were made from metals which interacted with the contents of the bottle, causing changes in their color and flavor.

The shelf-life of soft drinks is determined by the CO2 level, which decreases due to permeation through the packaging material. Therefore, most of the responsibility in the shelf-life extension of such products has to be attributed to the bottle material performances, such as the ability to maintain the internal CO2 through the shelf-life, that is, in other words, its barrier property to CO2.

From the beginning a successful drink depended on retaining the gas in the liquid and Thomas Henry a Manchester apothecary recommended that all bottles be very closely corked and sealed.

Traditionally, beverages have been packaged in glass containers capped with a natural or plastic cork to limit oxygen intake and preserve the organoleptic quality of the beverage.

The crown cork evolved from the natural cork stopper. Cork stoppers were effective closures but did not meet the need to be applied at speed. The automatic production of glass bottles was perfected in the USA in 1903. This provided bottles with uniform dimensions at the neck that could take a standard closure. William Painter had already filed US Patent 468226 in 1892 for the 'crown closure'. Painter's crown was lined with cork and characteristically had corrugations in the 'skirt'.

Crown cork are items made from tinned metal used to fit on top of beverage bottles to seal and lock the contents of the bottle from being easily opened and for preventing any item from escaping out or from entering into the bottle .The crown cork is made from tinned metals with the interior part in contact with the contents of the bottle being covered off by a plastic disc.

For many years virtually all carbonated soft drinks were packaged in glass bottles sealed with crown cork. This closure has short skirt with 21 flutes which are crimped onto locking position on the bottle head. The flutes are angled at 15° in order or maintain an efficient seal.
Crown cork: History and description 

Glass bottle for carbonated beverages

The packaging of beverages both carbonated and non-carbonated, is a complex technological branch in the Food Processing /Packaging industry. The traditional returnable glass bottle has given way to newer plastic containers as well as cartons.

Although, the glass bottles means quality, Aluminum cans and PET bottles are still the first and second choices for most consumers. Carbonated soft drinks carbonated drinks packaging require ease openings, handling, and high gas barrier properties.

Glass bottles can be designed to accommodate higher pressures for products such as carbonated drinks, which is traditionally a high volume carbonation product. The level of carbonation will depend on design and wall thickness.

All carbonated soft drinks were packaged in glass bottles sealed with crown cork. This closure has a short skirt with 21 flutes which are crimped into locking position on the bottle head. The flutes are angled at 15° in order to maintain an efficient seal.

The bottles used in a glass bottle filling line can be either single-trip or returnable. Glass containers have the disadvantage of being breakable and sometimes heavy.
Glass bottle for carbonated beverages