"Hermetic" refers to something that is completely sealed or airtight, preventing the entry of air, moisture, or contaminants. This term is often used in various fields, including packaging, where products are preserved in a hermetically sealed environment to extend their shelf life and maintain quality. The concept originates from Hermes Trismegistus, a mythical figure associated with wisdom and alchemy. In alchemical traditions, hermetic sealing was believed to protect substances from external influences, ensuring purity and stability. Today, hermetic seals are commonly found in food packaging, pharmaceuticals, and electronics to safeguard contents from degradation.