How do I know when my bottle of TrueBlue was made?
Every bottle of TrueBlue is marked with a manufacture code, either on the top of the white cap, or on the side of the bottle between the cap and label. Look for the first 4 digits of the code, typically printed in black ink. The first digit represents the year it was bottled and the following 3 numbers being the day of the year it was bottled out of a total of 365 or 366 days in that particular year.