General - What Is The Shelf-Life Of E-Liquid?
E-liquid, if stored in a cool, dark and dry place, especially ones without nicotine, can have the original taste for as long as 2+ years. However, we suggest you use the e-liquid and cartridges within 12 months after the manufacturing date, especially if Nicotine is present. Remember that the longer you store the liquid for, the thicker and darker the liquid will become and the more the flavor and nicotine strength will degrade, however it will not go bad.
In the case of the Cartomizer models, we suggest you consume the cartridges within 1 week of unsealing (removing the leaf seal). However, if not un-sealed, they usually maintain the original taste for 2-years from date of manufacturing for nicotine-free units. If nicotine is present, we suggest using it within 1-year for original taste and strength.
As per 180 Degree Smoke website