However , during the winery aging, the smaller containers may develop differences. Also, the winemaker may blend together different grape varieties to achieve desired characteristics. These tartarates present in the grape juice tend to crystallize in wine and if not removed completely can slowly reappear as glass like crystals in final bottles on storage. Stabilization with respect to tartarates may involve chilling of wine that can crystallize tartarates and these crystals can be removed by filtration. Colored bottles help to reduce damage by light .
Bottle sizes can also vary.
It is a misconception that you MUST age wine. Tannin is a substance that comes from the seeds, stems and skins of grapes. Additional tannin can come from the wood during barrel aging in the winery. It is a preservative and is important to the long term maturing of wine . The good news is that after a number of years, what you get is a prized, complex and balanced wine.