Cortex wine packaging refers to wine bottles that are covered with a material resembling the bark of a tree, often made from paper or plastic. This design is often used for its aesthetic appeal and the perceived naturalness it conveys. The term 'cortex' comes from the Latin word for bark, and it's used to denote a protective outer layer. In the context of wine packaging, it's a marketing strategy that aims to evoke a sense of premium quality and eco-friendliness.