Period After Opening(PAO) Packaging Symbols Vector Illustration

The Period After Opening (PAO) symbol is a labeling icon found on product packaging—commonly on cosmetics, skincare, pharmaceuticals, and some food items—indicating how long a product remains safe to use after opening. The symbol, often shown as a small jar or pot with an open lid, typically includes a number followed by M (e.g., 3M, 6M, 12M, 18M), specifying the recommended shelf life in months once the product has been unsealed. This PAO indicator informs users of the product's optimal usage duration, ensuring safety, freshness, and effectiveness. Essential for products with limited life spans, this label helps customers track validity post-opening to avoid expired or less effective usage, promoting best practices for storage and timely usage for items like creams, lotions, medicines, and groceries.