Soft drinks in an unopened container can last anywhere from six to nine months past the sell by date located on the bottom of the can. This time frame is acceptable for storing soft drinks in the refrigerator or the pantry.
Once the can or bottle is opened, the soft drink typically becomes expired after a day or two. Storing soft drinks in a cool, dry climate with a constant temperature ensures they last longer. A soft drink that has low carbonation upon opening could be no longer suitable for consumption. The best time to consume a soft drink is prior to the sell by date.