Why does the carbonating bottle have an expiration date?

Since the bottle has to withstand recurring pressure from carbonation, it cannot be used forever. The expiration date on the bottle must be checked and new bottles purchased as soon as the former expires. The bottles must also be replaced if put in the dishwasher, exposed to a heat source, or if they have become scratched. All components of carbonating bottles are recyclable. Check with your local recycling authority for more information.