From: [email protected]
To: [email protected]
Thank you for contacting The Coca-Cola Company via our Web site.
The amount of PSIs (pounds of pressure per square inch) that a package is able to withstand depends on the volume of carbonation and is based on the product rather than on the package. At lower temperatures, the pressure is lower; at higher temperatures, the pressure is higher.
A can is able to withstand over 100 PSIs.
A 6.5 ounce glass bottle can withstand 225 PSIs.
A 16 ounce bottle can withstand 175 PSIs.
A PET bottle can withstand 250 PSIs depending on the temperature.
I hope this information is helpful. If you have additional questions or comments, please visit our Web site again.
Gina M. L'Heureux
The Coca-Cola Company
Industry and Consumer Affairs
Addendum:
A snippet of a email from Bruce Berggren to me contained some other pressure ratings, namely:
>500ml (couldn't fail with 170psi pump)
>1 liter (failed at 170)
>2 liter (failed at 125)
>Granted, this was only ONE specimen each.
I've never run a pressure test personally so I'm asking Coke for some more info on this. Meanwhile, you might play safe at 100 PSI. The w-rocket group thinks Coke bottles are some of the weaker types of PET bottles.